caisson cutting edge

例句：

1. 1.The caisson was used to hold the heavy cargo until it could be transported by ship.
   沉箱被用来存放重货，直到它能够通过船只运输。
2. 2.The caisson was a crucial part of the construction process.
   沉箱是施工过程中至关重要的一部分。
3. 3. The caisson was filled with water and then lowered into the sea.
   沉箱被填满水，然后被放入海中。