Chivundikiro cha dzenje chimayikidwa pamwamba ponyamula mafuta。Ndilo polowera mkati poyang'ana, kuyambiranso nthunzi ndi kukonza matanki。kuteteza油轮ku ngozi zadzidzidzi。
Nthawi zambiri, valavu yopuma imatsekedwa。Komabe, pakatsitsa ndikutsitsa kutentha kwakunja kwamafuta, ndikutsika kwa油轮kudzasintha monga kuthamanga kwa mpweya ndi kuthamanga kwa zingalowe。Valavu yopumira imatha kutseguka ndikutulutsa mpweya wina ndi mpweya wamagetsi kuti tanki ipanikizike bwino。Ngati pangachitike zadzidzidzi monga momwe zinthu ziliri, zimangotseka zokha komanso zimatha kupewa kuphulika kwamatanki mukamayaka moto。Momwe valavu yotopetsa mwadzidzidzi imadzatseguka yokha pomwe kukoka kwamkati amagalimoto yamagalimoto kumakulira pamitundu ina。