The theory of concrete mix design should also be perfected.
免振捣混凝土的配比设计理论也需要进一步地加以完善。
Traditional concrete mix form have the setting type and forcing type by oneself.
传统的混凝土搅拌形式有自落式和强制式。
The cons quickly mix together concrete, getting ready to fill the hole.
越狱团队匆忙混和好了混凝土，准备来封洞。
They mix sand and cement to make concrete.
他们把沙子和水泥混合制成混凝土。
They then mix and pour the concrete into the holes.
然后再混合混凝土倒进洞里来作固定。
Sand should be screened before you mix it with concrete.
与混凝土混合前，沙子该筛一筛。
Cement is the main basic ingredient of ready-mix concrete.
水泥石预拌混凝土最基本的成分。
Let's mix concrete, sand and stones.
把水泥、沙子和石子掺合在一起。
Let's mix concrete, sand and stones.
把水泥、沙子和石子掺合在一起。
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