Used in light industrial machinery or manufacturing workshops and packaging machinery, assembling the machine tools, machinery and transport equipment, cranes light industrial chemical training and conveyor systems, farm machinery and construction facilities.

A7PS series of the code switch, a dust, to look large, are installed in the construction, such as to promote joint operations; Set, large and easy to see the figures show that the division is fitted with a seal. The shutters, to prevent dirt from entering into it