Nkọwa dị mkpirikpi:

1. Ngwa njikwa njikọ mkpuchi mkpuchi tank: mgbe tank ahụ na-abanye, a ga-ekenye mkpuchi mkpuchi ya otú ahụ.Ọ bụrụ na enweghị tank, a gaghị enwe mkpuchi.

2, PLC arụ ọrụ panel imewe bụ ihe ezi uche dị na ya dị mfe, dị mfe ịhazi na ịnọgide na-enwe;