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How many systems are there in the equipment of residential property engineering department? What is the difference?

I. High-voltage system

1, elevator, special allocation, public allocation, etc.

Second, the weak current system

1, access control (visual intercom), indoor alarm

Third, the fire protection system

1, alarm equipment

2. Monitoring equipment

3, fire linkage

4, temperature, smoke, sound and light alarm, etc.

Fourth, the road braking system.

1, garage door, ground induction, etc.