基本解釋[交通運(yùn)輸工程]定壓減壓閥詞組短語短語constant difference pressure -reducing valve 定差減壓閥constant ratio pressure -reducing valve 定比減壓閥constant pressure pressure-reducing valve更多詞組專業(yè)釋義交通運(yùn)輸工程定壓減壓閥