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Basic knowledge of mechanical part drawing, CNC precision machining parts, turning and milling parts. 1. Question: what i...
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Question: what is cast iron? Answer: the iron-carbon alloy with carbon content greater than 2.11% is call cast iron. Ques...
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Quesion: what is tapping? Answer: To use a tap to cut out the internal threads on the wall of the hole. Reference knowled...
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