Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/e9c6c522b2a6ec6413d07d5aed1bc986.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 butt-welding是什么意思，butt-welding的翻译，butt-welding音标、读音、用法和例句_94生活常识网有道词典
Some crack extension probably developed from the unfused section of the butt weld across the thickness of the stiffener during transport and erection. 有些裂纹可能在运输和安装过程中就从加劲肋对接焊未熔透处开始发展。