1.

 In resistance electric welding, the current passed through two joining metal pieces is 

A. 230 to 440 volts, at a high amperage
B. 230 to 440 volts, at a low amperage
C. 2 to 8 volts, at a high amperage
D. 2 to 8 volts, at a low amperage
Answer» E.


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