Remove first check module from valve body and insert complete with O-ring in plug module adaptor. Seat firmly with moving portion of check module facing up.是什么意思_Remove first check module from valve body and insert complete with O-ring in plug module adaptor. Seat firmly with moving portion of check module facing up.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句