微型: miniature; minitype; mini-钻头: boring crown; bore bit; dril ...凿岩: drilling试验: experiment; test; trial微型钻头: microbit微型钻石钻头: miniature diamond instrument微型钻头；微比特: microbit微型钻头钻机: microbit drilling rig多头凿岩机: gang drill微型钻机: microdrillh型钻头: h bit; h-bit大型钻头: large-size drill切削型钻头: bit drag; chipping type bit; drag bit同心u型钻头: concentric utype drill bit微型凿岩机: midget excavator凿岩钻头: rock bit牙轮凿岩钻头: roller-type rock bit锥形凿岩钻头: cone rock bit钻湿土用大型钻头: miser打水井机凿岩钻头: rock bit for water well drilling rig三牙轮凿岩钻头: three-cone rock bit型钻: swage-block钻头杆试验: drill stem test (dst); drillstemtestdst; dst drill stem test; dst=drillstemtest钻头试验: head dip test凿岩钻头用硬质合金片: rock bit insert
