释义 |
twin-seat valve with one unidirectional seat and one bidirectional seat一单向座一双向座的双座阀twin-seat valve with one unidirectional seat and one bidirectional seat一單向座一雙向座的雙座閥兩岸對照名詞—機械twin-seat valve with one unidirectional seat and one bidirectional seat一單向座一雙向座的雙座閥機械工程 |