论述了井下矿山矿井计量漏斗的结构、工作原理和设计方法等。
This paper describes and discusses the configuration, coorking principle and design methods, etc, of measuring hoper used in underground mine.
它能否正常运行，对矿井的煤炭生产及井下矿工的生命安全起着重要的作用。
If it can work well, it is important to the producing of coal and the safety of workers.
目的：探讨煤矿井下矿工骨代谢变化。
Objective: To study the changes of bone metabolism in the underground coal miners.
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