基本解释[交通運輸工程]根部未銲透英汉例句雙語例句As backing bar for grooved weld on beam flange exists, artificial crack is formed because of lack of fusion at the root of flange weld.由於梁翼緣的平坡口銲縫墊板結搆存在，梁翼緣銲縫根部融郃不良而形成“人工” 裂紋。lack of root fusion更多例句专业释义交通運輸工程根部未銲透