1.
The brass and bronze are welded by _________ flame.

2.
A gimlet is a ________ tool.

3.
In TIG arc welding, the welding zone is shielded by an atmosphere of

4.
In sheet metal blanking, shear is provided on punches and dies so that

5.
For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately

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