welding造句
The
welding is so smooth that you can hardly see where the sections of pipe are joined together.
这管子焊接得很光滑,你很难看出什么地方是焊接的.
The
welding conditions should always be neutral or slightly oxidizing.
焊接气氛必须永远保持中性或微氧化.
All skilled
welding and fitting was done by regular employees.
全部技术性的焊接和装配活都由正式工人担任.