Products - button bit,retrac button bit,DTH bit,DTH hammer,tricone bit ...
Is located in the seat of north China petroleum - renqiu, specially designed for the oil drilling industry production of diamond bit, cone bit, PDC bit, etc. ... all kinds of drilling bit, core drill bits and drill bits, special purposes and can be customized according to customer requirements of various large diameter drill assembly.
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rqdyzt's website is rqdyzt.com