Transmission, built in the top drive power head, has two speed range? High and low. It can meet the requirements of both DTH hammer drilling and carbide bit drilling.

　
英 美
  • 動(dòng)力頭設有變速裝置,有高低兩個(gè)檔次,以滿(mǎn)足潛孔錘鉆進(jìn)及硬質(zhì)合金回轉鉆進(jìn)方法。
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