耐火被覆 (たいかひふく) — fire resistance covering ၊ fireproof coating ၊ fireproof cover ၊
耐火被覆
た い か ひ ふ く
Fire resistance covering ၊ fireproof coating ၊ fireproof cover ၊
ပုံရှာဖွေမှု

耐火被覆 (たいかひふく) — fire resistance covering ၊ fireproof coating ၊ fireproof cover ၊
