The "fox" was a seat suspended by pulleys from an overhead rope, much like the device sailors use to transfer men between ships.
狐蝠是从高架的绳子的滑轮上悬下来的座椅，很像水手使用的在船与船之间进行人员转移的装置。
Aviation electric hoist is mainly used for people rescue and material transfer under extreme conditions. However, a tension control system of wire rope winding machine is necessary for safety purpose.
航空电动绞车主要用于极端条件下人员救援或物资运送，为保证安全工作，需加装钢缆缠绕机构张力控制系统。
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