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Arm section, arm support and mechanical equipment
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Welding manufacturing system and welding manufacturing method for structural member, and storage medium
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Control valve unit, hydraulic control loop and engineering equipment with telescopic crane boom
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Engineering machinery health monitoring method, residual life estimation method and system
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Movable counterweight lifting device, method for controlling movable counterweight lifting device and engineering machinery
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Cage connecting structure and elevator
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Handrail device and excavator
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