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person:("Ma jing")
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person:("Ma ming")
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person:("Ma ying")
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person:("Ma ding")
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person:("Ma ping")
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person:("Ma xiang")
Vehicle-ground joint control unmanned crossing control system
Vehicle battery replacing method, battery replacing station, vehicle and system
Truss unit hoisting, positioning and butt joint method
Structural device convenient for transferring hydrogen storage tank
Speedometer on-site verification system based on Internet of Things
Regenerative braking energy management method and related assembly thereof
Railway station transportation room comprehensive control system