发布时间:2025-01-20 18:26:47
可以。在大体积混凝土中,2~3天内部温升可高达近100°C,而钙矾石分解温度是70°C,但是温度降到70°C以下时,钙矾石会再次生成,即延迟钙矾石。
粉色棉服上染上了牛仔裤的淡蓝色怎么才能清洗干净有人教我用啤酒净泡两个小时在用手搓衣能洗干净吗
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