头带式面罩具有舒适性好、视野宽阔，但工艺较复杂、佩戴不易气密等特点。
Fillet gas mask has the features of comfortable wearing, wider visual field, but complex technology, sealed ability wearing is not easy.
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。
Respiratory protective devices - Compressed air line breathing apparatus for use with a full face mask, half mask or a mouthpiece assembly - Requirements, testing, marking.
一名焊工的成套工具包括焊钳、焊炬、面罩、手提式焊条加热箱和测温笔。
A welder's kit contains electrode holder, welding torch, helmet shield, portable electrode heating box and temperature measuring pen.
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