Nitrogen hte shingdaw yu yang, hydrogen gaw kaja ai nbung n-gun, n-gun n law ai, n-gun n law ai hte n-gun ja ai shayawm ai lam ni a akyu ni nga ai, nitrogen-hydrogen kayau ai hpe makawp maga ai gas hku nna kalang lang galai shai kau ya ai. Dai aten hta sha, bell furnaces ni hpe shim lum ai hku hkang lu na matu grau nna ngang kang ai ra kadawn ai lam ni hpe tang madun dan ai.
Shawng nnan, wan wut a makawp maga ai shingnip hte stove a magri n-gang ni yawng gaw, arung arai langai hte langai a galaw shapraw ai atsam hpe ngang ngang jum tek da lu na matu, X{0}ray n kaja ai lam hpe sawk sagawn ai lam ni rai nga ai. Lahkawng ngu na hta, annealing cycle a npawt nhpang hta, gauges hte switch position yawng hpe jep yu ai majaw, shanhte hpe hkrak ai set position hta tawn da ai. Kata na shingnip hpe hkyen lajang da ai wan wut hta gyit da ngut ai hpang, hydrogen inlet valve a hka pru wa ai hpe galaw ngut ai hpang, furnace shara a hka lim ai chyam dinglik ai lam hpe galaw nna, wan wut ai shara hte kata na shingnip ni hpe tsep kawp pat da lu na matu, n-gun n-gun chyam dinglik ai lam hpe mung, n-gun kaba ai gas hpaw ai jak hte hydrogen main hpaw ai shara hta galaw ai. Leak test hpe lai ngut ai hpang, wan wut shara hpe nitrogen hte chya da ai. Nitrogen hpe hka ja ai lam gaw ngut kre na matu masa 3 hpe hkan sa ra ai, nitrogen hpe hkap la ai lam nkau mi, nitrogen kaji dik htum aten: 1% hta n-pu na oxidation content.
Bell furnaces ni hpe law malawng gaw n-gang wire, n-gang pipe, magri n-gang, magri sumri hte silicon n-gang n-gang ni hpe n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-rawng ai. Dai ni hta, magri mang gaw madung hku nna, magri n-gang, magri n-gang, laksan{1}}} nsam rawng ai magri mang, magri mang hte kaga arung arai ni a matu madung hku nna htuk manu ai.
