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Ukuqapha ingcindezi kuyisilinganiso esiyisisekelo futhi esibaluleke kakhulu ekukhiqizeni uwoyela negesi. Inqubo yokudluliswa kukawoyela idinga ukugcwalisa amanzi amaningi nesihlabathi kusengqimba kawoyela ongaphansi komhlaba ukukhulisa ingcindezi ngenkathi kukhiqiza i-vacu ebanzi. ngaphezu kwengqimba kawoyela. Uhlangothi lwengcindezi ephezulu luzophoqa inani elikhulu lika-petroleum ohlangothini lwengcindezi ye-vacuum zero olungenza ukugeleza kukawoyela kusuka ku- ngisho kusuka ekujuleni okungu-10 km ngaphansi komhlaba.
Kodwa-ke, ubungozi bokushisa nokuqhuma kukaphethiloli negesi yemvelo buhambisana nengcindezi yezemvelo kanye nezinga lokushisa ezindaweni zokucubungula ezingaphansi komhlaba. Ngisho nophethiloli ocwengisisiwe kusuka ku-petroleum kuwuketshezi oluvuthayo futhi oluqhumayo enqubweni yokudlulisa nokuthutha. Ngakho-ke ukuqapha okuthembekile nokuqondileUkudlulisa kwengcindeziKanye namadivayisi wokulawula ingcindezi yegesi ofaUkushintshwa kwengcindezi ye-pneumaticKubaluleke impela kuyo yonke inqubo yokukhiqiza, yokuthutha, nokuthengisa.
Ama-Lefoo wengcindezi kanye nokushintshwa kwengcindezi yizixazululo ezinhle ezimbonini zikawoyela negesi. Ukudlulisa izinga lokushisa le-LEFOO kungaba yizinto ezinhlelweni zokulingana
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