Sababtoo ah ma jiro lakabka oksaydhka ee gidaarada gudaha iyo dibedda ee saxda ah ee tuubada dhalaalaysa, ma jirto wax qulqulaya cadaadis sare, saxsanaan sare, dhammayn sare, ma laha qalloocin qabow qabow, dhalaalid, fidsan iyo dildilaac la'aan, inta badan waxaa loo isticmaalaa in lagu soo saaro alaabta. qaybaha pneumatic ama haydarooliga, sida dhululubada hawada ama dhululubada saliidda, kuwaas oo noqon kara tuubo aan xidhnayn ama tuubo alxan leh.