基本解釋[能源科學(xué)技術(shù)]回流管英漢例句雙語例句Watts Dual Check Backflow Preventers can be specified in many different combinations of connection types, sizes, and union options.美國(guó)瓦茨雙止回防回流閥可以按照連接類型、通徑和接頭構(gòu)成許多不同的組合。backflow connection更多例句詞組短語短語backflow w connection 回流管Connection backflow 回流連接backflow connection更多詞組專業(yè)釋義能源科學(xué)技術(shù)回流管