Shaanxi Hainaisen Petroleum Technology Co.,Ltd
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  • cross drill bit

    Contact Nowcross drill bitDrill Type Bit diamater   (D) Taper Whter hole (d) mm Part no Chisel  Bits mm in 30 1Read More2015-08-24

  • chisel bit

    Contact Nowchisel bitchisel bit:the chisel bit is made from grade hard alloy and special steel,generally matched with the light-duty rock drill,to drill the rock hole within diameter of 50mm.it is widely used in metallurgRead More2015-08-21

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