... semi-space volume source 半空间体积源 semi-spherical bit 半球形钻头 semi-splint coal 中亮条带煤 ...
基于1个网页-相关网页
There we want to think a tiny bit about spherical coordinates again.
我们需要再次考虑球坐标。
So, in fact, it simplifies quite a bit if you do it in spherical coordinates.
事实上用球坐标，简化了式子。
But now the use of the spherical one-cone bit shows that the teeth are abrade heavily in advance, which affects the velocity and life of the bit.
但是目前油田上使用的球形单牙轮钻头由于牙齿先期磨损严重，影响了钻头的机械钻速和寿命。
应用推荐