Is it illegal to use water from behind my own factory s fire meter to flush toilets?

Pay attention to the most critical point: if the balcony is closed, a live fan must be kept, fixed with a lock, and can be opened at any time, so as to escape in case of fire!

Guns with fireproof functions are not allowed, the rest can. And it depends on the fire rating of your building. It's not necessarily allowed, just look at the fire resistance time of your solid wood door.

As long as there is a factory with an independent R&D department, it can be done, and the design drawings of the product are required, and there are quantity requirements for batch production.

This dream is a sign that you may have been feeling a little tired physically and mentally because of a lack of exercise lately.

Hang a counter at the door, and when you go in, you can press it and easily count it.