短钻杆按台肩形状分为斜台肩和直台肩两种结构。

According to the shape of the shoulder, the structure include sloping shoulder and straight shoulder.

youdao

短钻杆按台肩形状分为斜台肩和直台肩两种结构。

According to the shape of the shoulder, the structure include sloping shoulder and straight shoulder.

youdao