What outreach units does the Property Engineering Department have contact with?

In addition to what I said upstairs, I would like to add a few points:

Communication service providers (telecom, mobile, etc.). ), elevator maintenance, after-sales maintenance of access control and monitoring system, air conditioning condenser pipe and downpipe maintenance (high-rise residence, property can not handle aerial work) and some conveniences, such as air conditioning maintenance, store maintenance, unlocking and so on. . .

My idea of these things is that the more complete the better, so that we can be prepared.

I hope it helps you.