Peb nce nqi khoom txij thaum Lub Rau Hli 1th vim yog cov khoom siv raw ntawm cov hlau tsis muaj steel, cov ntawv galvanized thiab cooper nce nqi ze li 50%, thiab tseem muaj cov tshuab hluav taws xob oxygen tus nqi nce rau cov molecular sieve tawm ntawm Tshuag uas tshwm sim los ntawm Indian maket.

Nws yog ib qho nyuaj heev rau Tuam Tshoj xyoo no.Peb thov txim rau qhov tsis yooj yim no tab sis nws yog qhov kev lag luam tiag tiag.

Cia siab rau koj txoj kev nkag siab, ua tsaug!