Based on skateboards and hinge linkages, a simple multifunctional evacuation chair is designed, which can be used both on ground and down stairs.
科学工作者基于滑板和铰链连杆机构，设计了一种可同时在平地和楼梯上使用的简易多功能逃生椅。
Based on skateboards and hinge linkages, a simple multifunctional evacuation chair is designed, which can be used both on ground and down stairs.
科学工作者基于滑板和铰链连杆机构，设计了一种可同时在平地和楼梯上使用的简易多功能逃生椅。
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