It is suitable for prefabricated structure.
I'm probably aware of your concerns.
In fact, industrial standardized production is easier to ensure the stability and durability of structural components. You can't see what the concrete of the main structure of the construction site is poured into. The concrete is the same as a truck. The truck is sparse, and the workers who pump it upstairs leak vibration again.
Alas... On the contrary, the prefabricated components sent by the manufacturer, which is called a beautiful one, can be washed out by splashing basin water, and lie on it in summer. Man is always the most unstable factor in 7M.
