Mipope yathu yowotcherera yachitsulo imabwera mu mapaipi otenthetsera matako, machubu otenthetsera arc, machubu a Bundy ndi mapaipi otchinga, ndi zina zambiri. Ali ndi mphamvu zambiri, amalimba bwino, ndipo ndi otsika mtengo, amapangidwa mogwira mtima kuposa mapaipi opanda msoko, kugwiritsa ntchito zitsulo zowotcherera. mapaipi makamaka amabwera potengera madzi, mafuta ndi gasi.