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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
Modularized uninterruptible power operation equipment supporting platform
Hoisting device and hoisting method of composite floor slab
Field pressure conversion device suitable for aircraft