Warning: file_put_contents(): Only 0 of 6150 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/totle.com.cn/index.php on line 55 striking of an arc例句_striking of an arc英汉例句_striking of an arc双解例句_乐豆毛深蓝词典
Before striking an arc, the welder frequently taps the end of the electrode on the ground to break away flux at the tip. 在引人注目的一个弧形，水龙头的焊工经常年底电极地面上打破通量的小费。