发布时间:2025-01-26 17:32:32
原因很简单,混凝土有水化热,凝固期也是他的散热期,最外层是与空气接触氧化的最薄弱层,这也是做路面混凝土最上层要每隔一段时间反复压光的原因。
PHILIPS 飞利浦 HD7762 全自动咖啡机-详细介绍
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