Then it is followed by cement setting and hardening and a cellular structure is formed in the concrete, which is called gas-carrier cellular concrete.
复经水泥凝结硬化在砼中形成一种多孔结构，这程砼称之为载气体多孔砼。
It comprises setting-ball carrier, latch collar and baffle.
由送球器、锁紧座、挡板组成。
It comprises setting-ball carrier, latch collar and baffle.
由送球器、锁紧座、挡板组成。
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