PREVIEW
... n box is too great, even if four strong men lift the handles on both sides of the wooden box together, they will not be able to withstand the weight of the box and break it.
In the end, I had no choice but to use a simple tripod and a small cart to cooperate with each other, and the wooden boxes could be transported out of the cave one by one. Fortunately, the terrain of the cave is gentle, and it is more convenient to transport it. On average, a box should come out every five minutes. ...
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