救援被困工人的竖井深度大约622米，每救一个人需要1小时左右。

The escape shaft is about 622 meters deep, and it takes almost an hour for each rescue.

youdao

救援被困工人的竖井深度大约622米，每救一个人需要1小时左右。

The escape shaft is about 622 meters deep, and it takes almost an hour for each rescue.

youdao