基本解釋消防龍頭閥英漢例句雙語(yǔ)例句Contractors are not allowed to use any kinds of installations as water , gas , valve , hydrant and electronic switches etc. without permission .搭建方不準(zhǔn)擅自動(dòng)用展館的各種工程設(shè)施（指水、氣、閥門、消火栓、電器開(kāi)關(guān)等） 。hydrant valve更多例句詞組短語(yǔ)短語(yǔ)hydrant control valve 消防栓控制閥HYDRANT GATE VALVE 消火栓FIRE HYDRANT RELIEF VALVE 高壓安全關(guān)閉hydrant and valve maintenance worker 消防栓和閥門維脩工人fire hydrant valve 消防閥hydrant valve更多詞組專業(yè)釋義琯理學(xué)消火栓閥門機(jī)械工程消防龍頭閥