Ngenxa yokuba akukho maleko oksijini kwiindonga zangaphakathi nangaphandle zombhobho oqaqambileyo, akukho kuvuza phantsi koxinzelelo oluphezulu, ukuchaneka okuphezulu, ukugqiba okuphezulu, akukho deformation ekugobeni okubandayo, ukuvutha, ukucaba kwaye akukho zintanda, isetyenziswa ikakhulu ukuvelisa iimveliso. yezixhobo zomoya okanye zehydraulic, ezifana necylinder yomoya okanye ioyile cylinder, enokuthi ibe ngumbhobho ongenamthungo okanye umbhobho odityanisiweyo.