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A kind of self-closing gauge glass opening and closing linkage
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One kind filling noble gas hatch cover apparatus and operating method
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A kind of fuel oil tank permeability cell degreasing unit
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A kind of compressed air moisture trap
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One kind stays gap to wave welding method for stainless steel tube
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A kind of window epoxy peculiar to vessel filling fast calibration device and its method
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A kind of novel chimney can close shutter
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One kind can adjust automatically mark time horizontal wharf ladder
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A kind of fluid pressure type mast lift
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A kind of centering of shafting adjustment seat
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For the examination frame of welders training
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Novel liquid flow viewer
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Air automatic water draining device
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Retractable type exhaust pipe penetration piece
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Observation device of rudder-blade sealing plate
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Simple rudder angle feedback device installation base
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Method for realizing automatic filling of drawing page numbers by computer program
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Vibration reduction damper of ship hatch cover guide frame
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Method for manufacturing ship end launching accessory appliance in low water period
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Boarding inclined ladder with level pedal
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