该房顶由水泥棒、水泥瓦、水泥扒板三部分构成。这些只需一般的中小型水泥构件厂或个体专业户生产。
The present invention relates to a sandwich thermal-insulating roof formed from three portions of cement rod, cement tile and cement strap.
该房顶由水泥棒、水泥瓦、水泥扒板三部分构成。这些只需一般的中小型水泥构件厂或个体专业户生产。
The present invention relates to a sandwich thermal-insulating roof formed from three portions of cement rod, cement tile and cement strap.
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