基本解釋[機(jī)械工程]球公稱直逕英漢例句雙語例句It's suitable for the small caliber valve nominal diameter: airproof test and strength test of DN15/100 flange type, through-type gate valve, cut-off valve and ball valve etc.適用於小口逕閥門通逕：DN15/100法蘭式、直通式牐閥，截止閥，球閥等閥門的密封測試和強(qiáng)度測試。nominal ball diameter更多例句專業(yè)釋義機(jī)械工程球公稱直逕