filthy是什么意思

用法例句

Causes of mine fire hazard are analyzed and intelligent fire fighting valve is presented, which is made of memory alloy and self-extinguishing can b e carried out.

分析了矿内火灾发生的原因 ,并提出带有记忆合金的智能消防阀门能实现自动灭火。

This paper introduces a fuzzy mathematical method used in the evaluation and classifiction of the quality of mine air.

本文介绍了矿内空气质量评价及等级划分的一种模糊数学方法。