sand-fly
- 1. 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。
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- 2. 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？
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- 3. 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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- 4. 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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