Ishubhu elikhanyayo eliqondile liwuhlobo lwempahla yeshubhu yensimbi enembe kakhulu ngemva kokuqeda ukudweba noma ukugoqa okubandayo.Ngoba abukho ungqimba lwe-oxide ezindongeni zangaphakathi nangaphandle zeshubhu elikhanyayo elicacile, akukho ukuvuza ngaphansi kwengcindezi ephezulu, ukunemba okuphezulu, ukuphela okuphezulu, ukugoba okubandayo ngaphandle kokuguqulwa, ukuvutha, ukucaba ngaphandle kokuqhekeka nokunye, kusetshenziselwa ikakhulukazi ukukhiqizwa kwezingxenye ze-pneumatic noma ze-hydraulic.