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Qingdao,Shandong,China China
1.excellent drilling penetration 2.used in very hard or hardest rock formation 3.adequate for various construction condition 4.strong corresion res
The drill bits are suitable for digging of very hard rock formation, hard formation and crack-grown formation All bits have to be reground at regular
Personne àcontacter Lily zhang
Nom de la société Qingdao, Shandong
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