Kushushikana kweiyo API 5CT mafuta ekuisa mugomba remafuta: kuve nechokwadi chekuti casing inopinda mutsime inoenderera, isina kuputika kana kuremara, iyo casing inodiwa kuti ive neimwe simba, inokwana kuramba simba rekunze rinogamuchira. Naizvozvo, zvinodikanwa kuongorora kushushikana pane ...
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