The T22 series indicator all adopts LED to give out light the chip as the light source. Its main feathers are long spaning life, low consuming ability, small physical volume, weight light, safety and convenience.
It is applicable to electric power, tele-communications, tool machine, ships, spin and weave, print to rinse, mineral mountain machine etc. equipments of make designation signal in the circuit, preannounce signal, and past signal and other designations use signal.

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