bottom-shaft

基本解释

The optimal positions of the vibration sensor should be located on both sides of the crank-shaft bearing or bottom of the engine.
传感器最佳位置是在曲轴轴承正对的发动机两侧或油底壳处。
They worked with hand trowels, a plywood form for lining the shaft with concrete, inch by inch, and a sturdy hand-built crank for lowering a man to the bottom and sending up buckets of sand.
他们的作业工具是：挖土用的手工泥铲、浇筑混凝土井壁用的胶合板模板、还有手工制作摇杆。摇杆将一个人送到井底，那个人就在井底一点点挖土然后再通过摇杆把沙子一桶桶送到地面。
And the Fuzzy-follower is applied in shaft bottom coal conveyor of a medium-sized coal mine and gives good results. Thus, it solves the problem of power balance of double-motor driving system.
该模糊跟随器在某中型煤矿的井下原煤运输系统中进行了实际应用，效果良好，较好地解决了双电机拖动系统的功率平衡问题。

Rehabilitation work on the Silver Shaft began in the first quarter of this year and is now completed to around the 5, 700-foot level, which is around 400 feet from the shaft bottom, the company said.
FORBES: Update:Hecla Plans To Reopen Lucky Friday Mine In 1Q; Loss Reported In 3Q