Manufacturing And Production Technology
What type of fusion welding process is used for welding sheet metals of all engineering metals (except Cu, Ag) in automobile and air craft industries, pipe and tubing production?

Resistance welding
Submerged arc Welding
Electroslag welding
Thermit welding

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Manufacturing And Production Technology
In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to

Circular interpolation in counter clockwise direction and incremental dimension
Circular interpolation in clockwise direction and incremental dimension
Circular interpolation in counter clockwise direction and absolute dimension
Circular interpolation in clockwise direction and absolute dimension

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