Pit furnace em i wanpela bilong ol bikpela kain boiler long wok bilong wokim ol masin bilong nau, na wok bilong pit furnace i wok gut moa taim ol i yusim long mekim wok long ol kabon kompaun insait long ain. Risen bilong dispela em olsem dispela ikwipmen i save gat wanpela protektiv atmosphere long prodaksen, bai wokpis i ken mekim gutpela pes i stret bihain long pinisim, na mekim gut wok bilong wokpis. Bes long ol dispela gutpela samting, ol i save yusim ol pit oven long sosel prodaksen, na diman bilong ol i wok long go antap long olgeta yia bihain long yia.
Ol i ken hatim ol pit oven inap hat wantaim ges o wara i gat wara, o wantaim pawa. Taim ol i yusim ges bilong paia, i gat planti taim i gat planti samting i no strong tumas, em ol i save putim long tangensial daireksen bilong wol insait long oven, na ol i save stretim wankain long ol leit o spiral long hait bilong abrusim paia i save wasim wokpis na lukim olsem temperaja insait long oven i wankain. Taim ol i yusim long daunim o yusim oil olsem fiul, ol i wokim wanpela liklik wol bilong muf long paia bilong separetim spes bilong paia long spes bilong hatim, tasol pit oven wantaim mufel wol i save kaikai planti fiul.
