例句與造句

1. Besides all these , an automatic wire - feeding circuit and its control system are designed for the welding machine is semi - automatic arc welder
   此外，由于焊機(jī)為半自動焊機(jī)，論文中設(shè)計(jì)了焊絲的自動送進(jìn)系統(tǒng)及其調(diào)速控制系統(tǒng)。
2. It's difficult to find automatic arc welder in a sentence. 用automatic arc welder造句挺難的