The roof and floor panel sizes are also standardized, insuring efficiency in fabrication, packing and transportation.

屋顶和地板的尺寸也在标准化，确保生产效率，包装和运输效率。

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The roof and floor panel sizes are also standardized, insuring efficiency in fabrication, packing and transportation.

屋顶和地板的尺寸也在标准化，确保生产效率，包装和运输效率。

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