建立了牙轮钻头的球形齿、楔形齿和勺形齿三维空间的几何模型；

Geometry model of roller bit's sphere tooth, wedgy tooth and bucket shape tooth were established;

youdao

建立了牙轮钻头的球形齿、楔形齿和勺形齿三维空间的几何模型；

Geometry model of roller bit's sphere tooth, wedgy tooth and bucket shape tooth were established;

youdao