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A kind of dc welding machine wireless control system
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A kind of mouth holds formula Multifunctional welding mask
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A kind of portable personal electrical shock protection detection device
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A kind of major diameter tubing cutter special
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A kind of gas pump drainage system air water automatic separating apparatus
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A kind of adhesive tape is vertical to tear side integration protective device
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A kind of underground air door blocking device
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A kind of industrial multi-functional electric soldering iron
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One kind weldering fume purifying apparatus
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A kind of pneumatic stiff mud of underground coal mine digs clearly shovel
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A kind of shockproof alarm circuit and wrist type Antistatic alarm
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With the method for flexible air-bag processing roof of coal face accident
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A kind of colliery is with cutting people's prior-warning device before blowing out
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Welding rod drying and thermal insulation integrated box for coal mine
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Tramcar pin disengaging prevention device
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Wear-resisting method of elbow of pipeline for conveying coal slurry and dedicated wear-resisting elbow
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Electric shock preventing device of alternating current arc welding machine
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