brass fire sprinkler,
Fire Sprinkler,
modle:DN15/DN20,
critical temperature:68/79/93 Celsius,
glass bulb dia:3mm/5mm
ZST brass fire sprinkler,Fire Sprinkler,modle:DN15/DN20,critical temperature:68/79/93 Celsius,glass bulb dia:3mm/5mm1.Detail pictures2.Technical...