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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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。

youdao