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By certification 
Mainly used in some hands can not reach the place, such as: narrow gap, height, trachea, machine parts and so on.
1. New tool body design compact, easy to carry.
2. Use in some hands can not reach some of the more narrow, high, and clean the trachea.
3. The use of new technologies, energy saving.
4. Trigger and handle as a whole, people in the use of pneumatic blowing dust gun when more convenient.
