Spool imhando yepombi yekuisa inoshandiswa pabazi repombi.Iyo spool yakakamurwa kuita dhayamita yakaenzana uye dhayamita yakasiyana.Migumo yeakaenzana dhayamita spools ese akaenzana saizi;Ukuru hwemuromo wepombi yebazi idiki pane iyo yepombi huru.Kushandisa mapaipi asina musono kugadzira spools, parizvino kune maviri anowanzo shandiswa maitiro: hydraulic bulging uye inopisa kudzvanya.Kubudirira kwakakwirira;madziro emadziro epombi huru uye bendekete re spool rinowedzerwa.Nekuda kwehukuru hwematoni emidziyo inodiwa kune iyo hydraulic bulging process yeiyo isina musono spool, inoshanda yekugadzira zvinhu ndezviya zvine yakaderera kutonhora basa kuomesa maitiro.