The simplest method of welding two pieces of metal together is _____ as pressure welding（）
A: better
B: not
C: know
D: familiar
A: better
B: not
C: know
D: familiar
举一反三
- The welding operations of welding robots mainly include ( ) A: spot welding B: arc welding C: flat welding D: Continuous welding
- Write down two kinds of arc welding processes: nonconsumable electrode and two kinds of arc welding processes: consumable electrode in English
- Welding processes are generally classified into three basic categories: fusion welding、solid-state welding and .
- Small welding current is generally recommened for arc cold welding of castings due to （ ）. A: Small melting depth B: Small dilution C: Small heat input D: Small welding stress
- 手工电弧焊（shielded metal arc welding）时，对焊接区域所采取的保护方法是 。