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Welding clamping device
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Embedded composite lane board
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Air intake and exhaust system of civil air defense power station
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Chip control people's air defense ventilation system
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Wireless control civil air defense ventilation system
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A kind of welding gun holding device with adaptation function
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A kind of lane plate for civil air defense constructions and installations main entrance and exit
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A kind of closed guard gate's converting from wartime to peacetime production and vice versa auxiliary device
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A kind of anticorrosive coating technique of reinforced concrete closed guard gate
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A kind of inside and outside panel welding method of closed guard gate's door leaf
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Quick and efficient pneumatic expander and civil defense ventilation embedded pipe using same
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