China Naming Network - Eight-character fortune telling - It rained five hours after the rural self-built houses were watered. Are stairs important?
It rained five hours after the rural self-built houses were watered. Are stairs important?
It doesn't matter.
It will rain after five hours of concrete pouring, and it will rain after one hour of concrete pouring. When the concrete is initially set, it has little effect.
Concrete is one of the most important civil engineering materials. It is an artificial stone which is made of cementing material, granular aggregate, water, additives and additives added when necessary according to a certain proportion, evenly stirred, compactly molded, cured and hardened.