Ukusetyenziswa kwamandla aphantsi, izinga eliphezulu lokunyibilika.
Isixhobo esipheleleyo sokukhusela igesi, umxube wegesi ofanayo, ukuhamba okuzinzile, ukukhuselwa okwaneleyo, kuxhotywe ngesixhobo sokutshintsha ngokuzenzekelayo.
Ipleyiti yensimbi ye-bi-metal yenziwe nge-bismuth, ayingcolisi ulwelo lwe-magnesium, kwaye inobomi obude benkonzo.