A.填料室泄漏 B.關(guān)閉件泄漏 C.墊圈泄漏 D.閥桿升降不靈活
A.不能開(kāi)啟 B.突然開(kāi)啟 C.1.10倍開(kāi)啟 D.10.7倍開(kāi)啟
A.壓力表指針不動(dòng) B.壓力表表示模糊不清或有水珠出現(xiàn) C.壓力表指示不準(zhǔn) D.壓力表指針抖動(dòng)