Zeziphi izinto ezichaphazela isantya sokungena ekwembeni?
Kushishino lokomba, ireyithi yokungena (ROP), ekwaziwa ngokuba yipenetration rate or drill rate, sisantya esiqhekeza ilitye elingaphantsi kwalo ukuze nzulu umngxuma wokutsala amanzi. Ngokuqhelekileyo