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Double Interlock Preaction System With Electric Pneumatic Launch | #luz de emergência 2012

Double Interlock Preaction System With Electric Pneumatic Launch
Ciencia y Tecnología

Double Interlock Preaction System With Electric Pneumatic Launch

In the only interlock system, the valve must open to let water into the pipes, after which warmth must activate the sprinkler heads to launch the water.
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