Leli bhokisi lezipho elinemisebenzi eminingi lihlanganisa ukugxivizwa kwe-foil okuhle nokugqamisa, libonisa imiphumela kanokusho phezulu.Ingaphakanyiselwa phezulu, kuvulwe isivalo esiphakathi, siveze umumo ongama-semi-cylindrical.Amaphaneli aseceleni angakhishwa ukuze aveze amakhabethe amabili afihliwe, kuyilapho kukhona elinye ibhokisi elicashile elingemuva.Ividiyo ibonisa izici ezihlukahlukene zebhokisi lesipho, ikunikeza amazwibela okuhluka kwayo.