It is said that the outer wall of the metal wire box in the ceiling is brushed with fireproof paint,

It belongs to concealed installation, which refers to the laying of pipelines under the ceiling of the basement or in the ceiling, or concealed laying in tube wells, pipe grooves and pipe trenches.

The decorative metal lines of the ceiling are hollow synthetic plastic panels, PVC panels and aluminum gussets >>>More

If the metal bellows belongs to the thermal pipe, it should be set with the "expander" sub-mother, and if it belongs to the electrical sub-pipe, it should be installed with the "metal hose".

It must be to tell the electrician, not to mention how he discharges the wires, if the ceiling wants to open the light hole, only to talk to the ceiling.

Take a wardrobe as an example.

Bore: The façade, where you can see at a glance, do not open doors or open drawers. >>>More