Ƙimar lokacin juriya na wuta na ƙofofin wuta an raba shi zuwa Class A, Class B, da Class C. A cikin ƙayyadaddun ƙayyadaddun, ƙofofin wuta waɗanda zasu iya biyan buƙatun amincin wuta da haɓakar thermal a lokaci guda.

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