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Q. |
grades wire are used in automatic re-threading mechanisms. |
A. | malleable |
B. | softer |
C. | harder |
D. | commercial |
Answer» C. harder | |
Explanation: the harder grades are used in automatic re-threading mechanisms and also if the machined shapes contain high flat surfaces. hard wires resist change in direction and for that reason are likely to produce nice flat surfaces. |
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