防尘口罩

对自吸过滤式防尘口罩标准死腔值的探讨

Discussions on the Value of the Dead Space for Self-inhalation Filter Type Dust Respirator

防尘口罩根据它们的防护效果分等级。

Dust masks are graded according to the protection they offer

基于FLUENT的防尘口罩泄漏性试验装置喷头流量检测分析

Measurement and Analysis of Nozzle Flow in Respirator Leakage Tester Based on FLUENT

特别注意的是在台面的切割、打磨过程中，一定要戴上防尘口罩和手套。

Be careful to put on mask and gloves while grinding and cutting .

工人佩戴防尘口罩。

Face workers should wear dust mask .

防尘口罩用过滤材料

Filter for dust respirators

井下作业面采用湿式凿岩、煤层注水和作业面喷雾等措施降尘，工人戴过滤式防尘口罩。

Some measures such as wet chisel , coal bed affusion , filter dedust mask and so on were taken to reduce dust hazards .

还有一个项目针对粉尘对石雕工人构成的肺部健康隐患向他们介绍防尘口罩和其他防尘措施。

Another example was trying to introduce face mask or other health interventions to stone-carving workers who were exposed to the risk of dust-related lung disease .

实验证明，口罩死腔值过大引起佩带者呼吸困难，吸氧量不够是主要原因，我国防尘口罩标准中对口罩死腔的允许值和要求值大是引起这种现象的关键所在。

Experiences prove that it is because of the big permitted value of dead space in the national standard that brings about difficult breath and lack of oxygen .