Upright sprinkler
办公文具Dropped sprinkler
办公文具Horizontal sidewall sprinkler
办公文具Fusible alloy sprinkler
办公文具Concealed sprinkler
办公文具Early suppression fast response (ESFR) sprinkler
办公文具Dry sprinkler
办公文具Water flow indicator
办公文具Pressure switch
办公文具Wet alarm valve
办公文具Drain alarm valve (diaphragm type)
办公文具Drain alarm valve (lever type)
办公文具