Fire door page according to the thin thickness can be divided into a, B, C and D three specifications, the higher the specification, fire door noise reduction, heat insulation actual effect is stronger.

hollow metal door jobs,hluav taws kub ntsuas qhov rooj kick phaj,hollow metal door frame jamb depth,hollow metal door jamb dimensions,

hluav taws kub resistant qhov rooj manufacturers,hollow metal door jobs,ob chav steel ruaj ntseg qhov rooj nrog kho vajtse, duab ntawm ntoo kev ruaj ntseg qhov rooj rau flats, ruaj ntseg qhov rooj 820,hollow metal door frame jamb depth,kev nyab xeeb qhov rooj yees duab, 9 ko taw qhov rooj sab hauv,hollow metal door jamb dimensions,labeled vaj huam sib luag qhov rooj,

ntoo fireproof doorshollow,hollow metal door jobs,siv qhov rooj thaum muaj xwm ceev, hluav taws kub ntsuas qhov rooj ul, hluav taws kub ntsuas qhov rooj nyob