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person:(zhang zhang)
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person:(zhang zhao)
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person:(zhang zhen)
Movable medical and sanitary product production waste collecting tank
Hydraulic telescopic crawler transmission device and movable experiment operation table
Sand-discharging and dust-removing air conditioning unit and railway vehicle
Spraying control system of unmanned aerial vehicle with airborne mechanical arm
Wear-resistant self-lubricating material for mooring, preparation method thereof and fairlead
Fuel gas generating agent and preparation method thereof