What is the basic introduction of terminal blocks?

I. What is the basic introduction of the terminals? The use of terminals is becoming more and more extensive, more and more types. Terminals can be divided into WUK terminals, European terminal block series, plug-in terminal block series, transformer terminals, building wiring terminals, fence terminal block series, spring terminal block series, rail terminal block series, through the wall terminal block series, opto-electronic coupling type terminal block series, 110 terminals, 205 terminals, 250 terminals, 187 terminals, OD2.2 ring terminals, 2.5 ring terminals, 3.2 ring terminals, 4.2 ring terminals, 2, ring terminals, 6.4 ring terminals, 8.4 ring terminals, 11 ring terminals, 13 ring terminals flag series of terminals and sheaths series, various types of ring terminals, tube terminals, terminals, copper tape iron belt (2-03, 4-03, 4-04, 6-03, 6-04), and so on. The most widely used products are the PC terminals. Currently the most widely used are PCB board terminals, hardware terminals, screw terminals, spring terminals.

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