Warning: file_put_contents(/www/wwwroot/ppbbbu/202081.com/cache/733161f9fbcf9f8532c227fc12a44982.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/202081.com/index.php on line 55 lack of root fusion是什么意思，lack of root fusion的翻译，lack of root fusion音标、读音、用法和例句_2020年的事情英文词典
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. 由于梁翼缘的平坡口焊缝垫板结构存在，梁翼缘焊缝根部融合不良而形成“人工” 裂纹。