1) punching method with hollow hammer
空心锤冲孔法
2) Compacted-expanded method in column-hammer thrust boring
柱锤冲孔夯扩法
3) expanded bore by heavy hammer
柱锤冲孔
4) downhole hammer casing drilling method
潜孔锤偏心跟管钻进法
5) mallet perforator
锤式冲孔机
6) air DTH hammer
空气潜孔锤
1.
The principle of air DTH hammer is a drilling method to use compressed air as circulatory medium to flush borehole,cool bits,bring cuttings from bottom to surface.
空气潜孔锤钻进是以压缩空气作为循环介质来洗孔、冷却钻头,将岩屑从孔底带出孔外的钻进方法。
补充资料：揲揲锤锤
1.象声词。促织的叫声。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条