阀门基础知识 培训 手册 (内部资料,妥善保管) - 2 - 目 录 前言···························· 3 第一篇:基础篇······················· 4 第一节:阀门的分类··················· 4 第二节:阀门的术语··················· 5 第三节:阀门的参数··················· 8 第四节:阀门的编号··················· 9 第五节:各种阀门连接·················· 12 第六节:常用材料的密度················· 14 第二篇:阀门的结构和原理·················· 15 闸阀·························· 15 截止阀························· 20 节流阀··········