Preparation of high strength concrete with stonesand (stone screenings) and the application of the stonesand in the PHC pipe pile production are presented.
介绍了用人工砂(包括石屑)试配高强混凝土以及人工砂在预应力高强混凝土管桩生产中应用的情况。
2
He cried, "Help!" The taller boy asked him, "After I hurt you, you wrote it in the sand, but now you carved it on a stone."
他喊道:“救命啊!”个子高的男孩问他:“我伤了你之后,你把它写在沙子上,现在却把它刻在石头上。”
3
A stone in the sand in the setting sun could be very beautiful, they said.