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Since the advent of oxyacetylene welding in 1836, how many welding processes have appeared?

sslong79

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Since the advent of oxyacetylene welding in 1836, how many welding processes have appeared?

Since the advent of oxyacetylene welding in 1836, how many welding processes have appeared?

A) Over 50 B) Over 200 C) Over 100 D) Over 150

Q. 2

Pneumatic controls operate by

A) Electricity B) Air pressure
C) Hydraulic pressure D) Water pressure

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Same.sha

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sslong79 Author

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