In the elevator, on the installation of video lines and telephone lines to go and installation tutorials?
Cable wear waterproof casing is generally used in the location of the import and export, waterproof casing is generally the practice of pouring asphalt ointment or flange extrusion seal
I do civil construction, for the installation is not too understanding, I see, simply talk about. Junction box or weak box is generally fixed on the steel, usually iron, according to the location of the drawings, with steel welding fixed. Inside the sawdust at the end of what, tape sealing. Line pipe to do a good job sealing and sealing the interface, buried directly
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