dust mask,dust respirator是什么意思

用法例句

Author points out that intensifying management of ventilation, fire prevention and dust prevention is fundamental assurance of security production.

通过对孟南庄煤矿瓦斯爆炸事故原因的分析 ,总结出“一通三防”在煤矿安全生产中的重要性 ,指出只有抓好安全 ,加强现场通风、防尘、防火等管理 ,才能确保煤矿安全生

According to the air-defense project for both war and peace time in north area the design of ventilation system is discussed from four aspects: ventilation in water and transition period,dust prevention and noise control,which has a certain reference value for similar designers engaged in relevant area.

就北方地区一般用途的人防平战结合工程通风系统的设计 ,从供暖期及过渡季通风、排风口位置、防尘除尘、噪声控制四方面 ,提出了几点看法 ,以解决工程中遇到的环境问题。

Application of dust proof and extinguish technology for π fall roof working surface by injecting water and high pressure,drilling in two tunnels and spraying of MgCI2 to soft ect.

论述了π放工作面高压注水,两巷道打孔注水,工作面软帮喷洒阻化剂MgCI2,等防尘、防火技术的应用。

It may complete such tasks as decontamination,polishing,waxing and dust proof synchronously,its technology targets have reached the advanced leve of import product.

多功能有机硅蜡乳的制备工艺简单、造价低廉、使用方便 ,广泛用作车辆、家俱、设备表面的清洁护理剂 ,能集去污、上光、打蜡、防尘于一体 ,一次同步完成。

A new dust-proof assembly of mandrels of cots of combing and doubling machines is invented with patented no.

分析了A201系列精梳机分离胶辊芯轴及套筒的密封缺陷,指出其影响精梳半成品质量稳定和胶辊使用寿命,提出新型精梳、并条机胶辊芯轴防尘密封结合件(发明专利号:200520103347。

This essay makes an introduction to the design of the multiple lip-type seal ring s sizes, the points to be noted in the ring s molding process and the test of the ring s dust-proof ability as well as operational life-span.

介绍了多唇密封圈主要尺寸设计、注塑模具注意事项,以及防尘和寿命试验等。

Study of dustproof measures on belt conveying equipments;

皮带运输设备防尘措施的研究

Design and application of dustproof and mobile workroom for noise control;

降噪防尘移动作业室的设计和应用

According to the principle of waterflooding in coal seam,and based on the testing data,the water flooding in the shallow hole at the head of driving face will make the increase of water content of coal,and increase the power of molecule,and increase the effectiveness about dustproof.

根据煤层注水原理,以现场实测数据为基础,通过在掘进工作面迎头打浅孔向煤层注水,使煤的含水量增加,增加了分子间粘着力,增加了巷道的防尘效果,同时使煤的力学性质发生变化,塑性增强,硬度和强度降低,减少了煤体内部的应力集中和瓦斯放散的速度,从而造成煤层透气性增大、瓦斯充分释放、煤体瓦斯潜能降低,达到消突的作用。

The theoretical analyses and tests on the spot were conducted on tunneling working face dust control & ventilation in underground mines.

对巷道凿岩通风防尘进行了理论探讨和现场试验。