Four, steel structure material: polystyrene, extruded board, polyurethane board, glass cotton lap. Felt.

钢构材料：聚苯乙烯、挤塑板、聚氨酯板，玻璃棉卷毡等。

youdao

Four, steel structure material: polystyrene, extruded board, polyurethane board, glass cotton lap. Felt.

钢构材料：聚苯乙烯、挤塑板、聚氨酯板，玻璃棉卷毡等。

youdao