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閥門基礎知識 培訓 手冊 (內部資料,妥善保管) - 2 - 目 錄 前言···························· 3 第一篇:基礎篇······················· 4 第一節:閥門的分類··················· 4 第二節:閥門的術語··················· 5 第三節:閥門的參數··················· 8 第四節:閥門的編號··················· 9 第五節:各種閥門連接·················· 12 第六節:常用材料的密度················· 14 第二篇:閥門的結構和原理·················· 15 閘閥·························· 15 截止閥························· 20 節流閥··········