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quenching tempering processing threaded drill rod
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2025-06-21 00:34:32
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...product is subjected to high-pressure calcination and vacuum overall tempering heat treatment. It is processed and formed by CNC automation ...
2025-07-14 00:17:34
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... used with hydraulic rock drill and hydraulic drill rod. It can be used to drill holes by connect with different kinds of threaded drill rod. A ...
2025-06-21 00:36:19
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