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Vertical column of deepwater semi-submersible oil storage platform
Unmanned aerial vehicle aerial seeding afforestation method
Transfer device and mounting equipment comprising same
Pre-gravity compensation type large reservoir sewage self-purification equipment
Portable crane suitable for mounting rack type equipment and operating method thereof
Over-temperature protection method, device and system for brake resistor
Operator protecting system and overhead working truck using system
Navigation antenna retracting device and inspection unmanned aerial vehicle device
Multi-piston driving type synthetic jet underwater propeller
Motor driving device, control method, vehicle, and readable storage medium
Lightning protection grounding method for floating type photovoltaic power generation device in lake