基本解釋[交通運輸工程]根部未焊透英漢例句雙語例句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.由于梁翼緣的平坡口焊縫墊板結構存在，梁翼緣焊縫根部融合不良而形成“人工” 裂紋。lack of root fusion更多例句專業(yè)釋義交通運輸工程根部未焊透