Spiral Ventilation Duct
-
JULI®Spiral Ventilation Ducting
JULI®kauv ventilation duct yog nquag siv nyob rau hauv qhov zoo thiab tsis zoo siab nyob rau hauv underground, thiab nws yuav tshuab cua los ntawm sab nraud thiab tso pa tawm los ntawm sab hauv.
