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  Yesterday, I went to our sandwich panel and PIR board production plant located in Hwaseong-si, Gyeonggi-do. I took some picture of our sandwich panel products. ​ ​​First of all, there’re glass-wool(GW) sandwich panels. It’s also known as the mineral-wool sandwich panel. ​Although there’re some differences in the name, they’re produced with glass-wool(mineral-wool), which is non-combustible materials. Do you feel th