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Personne àcontacter Ms. vivi
Huanghe, Zhengzhou, Henan
Mainly have two kinds of quality: I and II Each kind has four sizes: *7mm, *8mm, *0mm, *2mm; Also we could make *6mm, *8mm, *2mm as clients&#**9; request; I is for drilling soft rock; II for drilling hard rock. This series can be used with *6mm**0mm twist drill rod and anchor drill rod , B*9, B*2 hollow hexagonal drill rod.
