1) drill for boring in corners
角用钻
2) drill and countersink combination
尖角钝角两用钻
3) bevel wheel drill
角钻
4) drill lip angle
钻刀角;钻口角
5) Drill-point angle
顶角/钻尖角
6) elevation bore
仰角钻孔
1.
High position bores and elevation bores methane drainage technique can prevent gas problem successfully.
采用高位钻孔和仰角钻孔抽放瓦斯技术,有效地防止了瓦斯超限。
补充资料:钻刀
1.以刀穿刺。指歃血盟誓。
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