Wopopera mafuta amagwira ntchito yopaka mafuta komanso yoteteza pamakina akulu oluka ozungulira. Amagwiritsa ntchito nsonga zopopera zothamanga kwambiri kuti azipaka mafuta m'njira yofanana kumadera ovuta a makina, kuphatikiza bedi la geji, makamera, zolumikizira zolumikizira, ndi zina zambiri.
Werengani zambiri