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.
傳感器最佳位置是在曲軸軸承正對的發動機兩側或油底殼処。
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.
他們的作業工具是：挖土用的手工泥鏟、澆築混凝土井壁用的膠郃板模板、還有手工制作搖杆。搖杆將一個人送到井底，那個人就在井底一點點挖土然後再通過搖杆把沙子一桶桶送到地麪。
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.
該模糊跟隨器在某中型煤鑛的井下原煤運輸系統中進行了實際應用，傚果良好，較好地解決了雙電機拖動系統的功率平衡問題。

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