High performance fly ash concrete is a kind of green building materials with vast development foreground.

粉煤灰高性能混凝土是具有广阔发展前景的绿色建材。

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High performance fly ash concrete is a kind of green building materials with vast development foreground.

粉煤灰高性能混凝土是具有广阔发展前景的绿色建材。

youdao