1) zenithal angle of hole
钻孔顶角
3) tip angle of drill bit
钻尖顶角
1.
This paper analyses that tip angle of drill bit influences on cutting capability and life of twist drill, when the material and shape of work piece is different.
分析了工件材料、形状不同时 ,钻尖顶角的大小对麻花钻切削性能及寿命的影响 ,介绍了麻花钻的钻尖顶角的选择 。
4) Drill-point angle
顶角/钻尖角
5) 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。
6) Dip angle in drill-hole
钻孔倾角
补充资料：尖顶
顶端；顶点。
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