The adult was a little confused.

He took the drawing, looked down and looked closely, only to realize that what was depicted on the drawing was nothing else.

It's a few water conservancy equipment!

The adult's eyes widened in shock, this was a large machine, and they couldn't have built a complete machine in the Construction Bureau.

And the machine was not made of wood, and some of it was built in advance on the river with a mixture of mud and sand.

......

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