短語詞組短語by -pass s valve 旁通閥hand by -pass valve 手動(dòng)旁通閥and By -pass Valve 負(fù)荷傳感旁通和比例閥internal by -pass valve 內(nèi)旁通閥relief by -pass valve 安全旁通閥 返回 by-pass valve