Fly ash can be used to make cement concrete. It can save cement and sand.
粉煤灰可用于水泥混凝土的制备，可节约水泥和砂。
How many seas must a white dove fly before she sleeps in the sand?
白鸽要飞过多少海洋，才能安睡在沙滩？
It is made up of sand, cement, thickening powder, fly ash and admixture.
通俗地说，主要有黄砂、水泥、稠化粉、粉煤灰和外加剂组成。
It is made up of sand, cement, thickening powder, fly ash and admixture.
通俗地说，主要有黄砂、水泥、稠化粉、粉煤灰和外加剂组成。
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