Njikwa ogo
Ruo ugbu a, ụlọ ọrụ anyị ejirila ahịrị mmepụta akpaaka 3, ụlọ nyocha 3 oyi / na-ekpo ọkụ enthalpy, igwe na-ejuputa ikuku zuru oke, yana akụrụngwa nnwale niile dị mkpa, dị ka igwe nyocha nchekwa ọkụ eletrik 4-in-1 na Halogen leakage checking machine, wdg. Jikwaa nke ọma njikọ ọ bụla nke mmepụta, kwe nkwa ịdị mma nke ngwaahịa, ma mee ka ndị ahịa nwee ahụ iru ala.