| 释义 |
preaction sprinkler system preaction sprinkler systemA dry-pipe sprinkler system which is activated by a smoke- or heat-sensing device, thereby opening a control valve and admitting water.
preaction sprinkler system  preaching cross at Inverary, Argyllshire, Scotland A fire sprinkler system using automatic sprinklers (heads) attached to a piping system; is controlled by a supplemental fire detection system, that is installed in the same area as the sprinklers; actuation of the detection system opens a valve which permits |