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★ ★ cassette: the switch, socket, the box below the panel, the line in the box with the panel together for easy replacement and maintenance. It should be noted that some manufacturers of branded switch sockets must be equipped with special cassettes.
★ ★ Socket: The device installed on the wall to provide electrical energy or electrical signals for electrical appliances is generally square type, and there are dozens of varieties today.
★★ Broadband socket: signal socket for cable or digital TV. The difference between an ordinary socket and a broadband socket is that the frequency range of stable transmission is different, the former is generally less than 450M, and the latter is required to be 860M. The reason for the high transmission frequency of broadband sockets is to accommodate two-way transmission and future digital television transmission. From the physical structure of the socket, wide-band sockets are required to be tight and reliable, and the shield layer is thicker. Therefore, broadband sockets generally adopt British-style spiral instead of the traditional plug-in type. In general, broadband sockets should be used for decoration. Correspondingly, the head of the coaxial cable should also use a spiral type. Picture see floor 33
★ ★ PVC pipe: PVC is PVC. Because chemical additives in PVC can cause cancer, kidney damage, damage the human body's functional reengineering system, affect its development, and its strength cannot meet the pressure requirements of water supply pipes, it is rarely used in water pipes for wire and sewage pipes. . When used for wire bushings, it is generally used on four points, with six points for individual high power. See floor 23
★ ★ brass: expensive pipe, generally do hot water pipe. Will not rust, not afraid of high temperature, stable performance. However, the interface needs to be soldered, and the solder is not easy to leak. In addition, if the house is settling, the copper pipe will be leaked and leaked. Because copper has strong heat transfer properties, it will be used as a hot water pipe to transfer heat away. So now there is a plastic coated copper pipe to reduce its heat transfer performance. The price is about twice that of a PPR pipe.
★ ★ PPR pipe: PP-R (Poly Propylene Random) is random polypropylene copolymer, is the most popular water supply pipe, using this raw material production of pipe, pipe fittings, in addition to ordinary plastic pipe light weight, high strength, corrosion resistance , Non-fouling, long service life and other characteristics, but also has high heat resistance and pressure capacity, easy installation, reliable connection (hot melt connection, so that the integration of the pipeline), thermal insulation, non-toxic and other characteristics . Divided into two kinds of hot and cold water. Many families use hot PPR pipes, and the total price is said to be only a few tens of dollars compared with households using hot and cold PPR pipes.
★★ Outer wire/inner wire: There are two kinds of inner wire and outer wire on the spiral wire end of the water pipe. Take the elbow to play the ratio: the inner wire elbow refers to the screw wire inside the elbow, and the outer wire elbow is Spiral wire outside the elbow, the general family used less.
★ ★ labor tube: galvanized steel pipe for gas pipeline construction.
★ ★ Tee: generally used in the water pipe or trachea interface, the two pipes into one, or a pipe into two when the connector, there are metal, but also plastic. It is generally T-shaped.
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