Hten bya ai hpe ninghkap lu na matu magri sumri ni a grup yin hpe htuk manu hkra galaw lu ai atsam

Brass a ntsa gaw zinc oxide (sh) basic zinc carbonate ngu ai n-gun ja ai makawp maga ai film hpe byin shangun chye ai, dai gaw neutral (sh) n-gun kya ai alkaline makau grup yin hta n-gun ja ai n-gun hpe madun dan ai. Panglai hka hte hka lim ai nbung zawn re ai n hkru n kaja ai lam ni hta, shi a n hkru n kaja ai lam hpe ninghkap lu ai atsam gaw, shinggyim carbon steel hta grau ai, raitim, stainless steel hta grau n-gun kya ai. Ndai lam hpe sadi ra ai gaw, lead-lawm ai magri (HPb59-1 zawn re ai) gaw, htu ai atsam hpe jat ya ai sha n-ga, lead a lubricating effect hku nna, n-gun n-gun hpe shayawm ya ai majaw, n-gun n rawng ai arung arai ni hta grai akyu rawng ai.