If you have ever seen a firefighter wearing a full-face mask with an air tank on his or her back, then you have seen an SCBA system.
如果你曾看到消防员穿戴全面罩防毒面具时，背上还有一个空气瓶，那么你就见过SCBA系统了。
In this case, a full-face respirator is called for. It provides a clear face mask or clear eye pieces that protect the eyes as well.
这种情况下需要用到全面罩呼吸器，可以提供透明面罩或者只是眼部透明，就同时保护了眼睛。
Respiratory protective devices - Compressed air line breathing apparatus for use with a full face mask, half mask or a mouthpiece assembly - Requirements, testing, marking.
呼吸保护装置。与全罩式面罩、半罩式面罩或口罩一起使用的压缩空气导管呼吸装置。要求、试验和标志。
If you've got shelves full of old cassettes that have garnered more dust than your first grade spelling bee trophy, it may be time to don the face mask and sift through them.
如果你有获得超过一年级拼字比赛奖杯的灰尘的旧磁带的货架上，它可能是时间戴上面罩，并通过他们筛选。
In this world full of false, no one can see the ture face under the mask.
在这个充满虚伪的世界里，谁能看得见面具下的真面孔。
Main structured items are: JDQM full face mask, air supply valve, pressure regulator valve, backboard, pressure gauge, alarming whistle, medium pressure tube, carbon fiber composite cylinder, etc.
主要结构有：JDQM全面罩、供气阀、减压阀、背板、压力表、报警哨、中压管、碳纤维复合气瓶等。
Main structured items are: JDQM full face mask, air supply valve, pressure regulator valve, backboard, pressure gauge, alarming whistle, medium pressure tube, carbon fiber composite cylinder, etc.
主要结构有：JDQM全面罩、供气阀、减压阀、背板、压力表、报警哨、中压管、碳纤维复合气瓶等。
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