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。
2
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.