1. A toroid generated by a circle; a surface having the shape of a doughnut. 环面,环形圆纹曲面''。'圆圈'。''形成的超环面;具有炸面圈一样形状的表面。
2. The magnitude of the current depends on the resistivity near the bit, and is measured by another toroid. 电流大小与钻头附近电阻率有关,由另一个螺旋线圈测量。
3. A transmitter toroid induces a low-frequency current in the drill string, which flows out of the bit and returns farther up the string. 发射线圈在钻柱内感应出低频电流,从钻头流出,在钻柱上部返回。
英英解释
n.
1. the doughnut-shaped object enclosed by a torus
2. a ring-shaped surface generated by rotating a circle around an axis that does not intersect the circ