简单介绍下ptc公司

PTC公司简介：技术驱动的创新引擎
PTC公司（Parametric Technology Corporation）是全球知名的工业软件公司，以其在计算机辅助设计（CAD）、计算机辅助制造（CAM）以及企业资源规划（ERP）等领域的技术优势而著称。作为一家具有深厚技术积累和广泛行业影响力的公司，PTC不仅在北美市场占据重要地位，还在全球范围内拥有广泛的客户群体和合作伙伴。
PTC的成立与发展历程
PTC公司于1982年在美国密歇根州成立，最初是一家专注于计算机图形学和算法开发的软件公司。随着技术的不断进步，PTC逐渐扩展其业务范围，从最初的CAD软件开发，逐步发展为涵盖多个工业领域的综合软件解决方案提供商。公司早期的成就包括推出第一款CAD软件“PROMIS”，这标志着PTC在工业软件领域的崭露头角。
在20世纪90年代，PTC开始进入制造和工程管理领域，推出了一系列具有开创性的软件产品，如“Pro/ENGINEER”和“PTC Windchill”。这些产品不仅改变了制造业的生产方式，也推动了全球工业自动化的发展。进入21世纪后，PTC进一步加强了其在工业软件领域的领导地位，尤其是在设计、仿真、分析和制造等方面持续投入研发，不断推出新一代软件产品。
PTC的核心业务领域
PTC的核心业务涵盖多个关键领域，主要分为以下几个方面：
1. CAD与CAE（计算机辅助工程）
PTC的CAD产品如“Pro/ENGINEER”和“PTC Inventor”是全球最广泛使用的CAD软件之一。这些软件支持三维建模、参数化设计、工程仿真等功能，广泛应用于机械设计、建筑、汽车、航空航天等领域。此外，PTC还推出了CAE产品，如“PTC Simcenter”，用于仿真分析和优化设计，帮助工程师在设计初期就进行性能测试，减少开发成本和时间。
2. 制造与工程管理
PTC的制造软件如“PTC Windchill”和“PTC PTC PTC PTC Windchill”是企业级制造软件的代表。Windchill主要用于产品生命周期管理（PLM），支持从设计、制造到交付的全流程管理。此外，PTC还提供制造执行系统（MES）和供应链管理软件，帮助企业实现高效、精准的制造流程。
3. 企业资源规划（ERP）
PTC的ERP解决方案如“PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC PTC P