用途：适用要求较高的微波器件，传感器，滤波器及航天，导弹上应用的元件气密性带压力保护的封焊。
Usage: suitable for air tight seal welding with pressure protection of microwave device, sensor, filter and components that used on spaceflight and guided missile that have high requirement.
转动轴腔充气密封，消除了粉尘粘结现象。带自动清洗功能。
The rotation drive shaft is sealed with inflatable chamber, eliminating the dust coalescence phenomenon. There is a function for automatic cleaning.
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.
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