Principles and methods to the terminals of alphanumeric symbols, the two endpoints of a single component with a continuous two numbers. Digital representation of the middle of each of the terminals of a single element with a natural number sequence is incremented.

   
The same element group, in front of numbers preceded by the letter, if the need to distinguish between other available digital-5N, -2.5, -16 flag. Similar element group. With a particular wire connected to the electrical terminals flag. The pressing mechanism of the terminal is the agency of the pressure generated between the wires and the conductive strips, and only generate sufficient pressure in order to ensure low contact resistance, and to form a good connection, so directly affects the reliability of the pressing machine to the wire connection good or bad. For screw-type terminal screws, and the pillars, and the pressure plate is an important component of the composition of pressed bodies; screwless terminal, spring or spring cards are important components of the compactor. Screw-type terminal, pressing means spring and spring selection is critical, both to ensure that there is sufficient contact pressure to ensure that not too much damage to the conductor, spring terminals is relatively reliable screwless terminal. Spring into the line, can be pressed by the push block or screwdriver into the line, releasing the spring, the spring back to the wire tension tightly pressed to produce a sufficient contact pressure, and then use the cutting edge of the spring strangle wire so do not loose or artificially pulled out.

   
Digital representation of the middle of each of the terminals of a single element with a natural number sequence is incremented.