P92 Concrete is a mixture of water, sand and gravel, and Portland cement.

混凝土是由水、沙和砾石、波特兰水泥拌合而成。

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P92 Concrete is a mixture of water, sand and gravel, and Portland cement.

混凝土是由水、沙和砾石、波特兰水泥拌合而成。

youdao