Lub sijhawm tiv thaiv hluav taws ntawm chav kawm A steel qhov rooj tsis pub tsawg dua 1.5 teev, thiab qhov yuav tsum tau ua no tuaj yeem hu ua chav kawm A qhov rooj hluav taws. Class A hluav taws qhov rooj sab hauv feem ntau siv perlite, me me ntawm cov ntaub ntawv refractory xws li vermiculite fire board, foam door core plate, MC compliant material, etc.

hluav taws qhov rooj thiab qhov rais hluav taws,panic tawm ntaus ntawv rau hluav taws qhov rooj hyland oem 310,3-teev-hluav taws-rated-qhov rooj 8″ jamb,hluav taws kub nyob hauv tsev so chav nkag qhov rooj nrog ncej,hauv qhov rooj hluav taws qhov rooj,3-teev hluav taws-rated-qhov rooj 8 “tuab,3-teev-hluav taws-rated-qhov rooj 8″ jamb,loj 9 × 21 los yog 10 × 21 hluav taws kub ntsuas steel qhov rooj,hauv qhov rooj hluav taws qhov rooj,hluav taws qhov rooj thiab qhov rais hluav taws,hluav taws tuav qhov rooj,hauv qhov rooj hluav taws qhov rooj,anti hluav taws qhov rooj, qhov rooj hluav taws kub,hluav taws qhov rooj thiab qhov rais hluav taws,lag luam wholesale hluav taws qhov rooj,3-teev-hluav taws-rated-qhov rooj 8″ jamb,hluav taws kub qhov rooj stopper