基本解釋[機(jī)械工程]浮球式疏水閥詞組短語短語Free -semi-ball float steam trap 自由半浮球式蒸汽疏水閥Lever -ball float steam trap 進(jìn)口杠桿浮球式疏水閥;杠桿浮球式蒸汽疏水閥ball float steam trap更多詞組專業(yè)釋義機(jī)械工程浮球式疏水閥