Peb yog ib lub tuam txhab nrog ntau tshaj 30 xyoo ntawm kev tsim khoom thiab 12 xyoo ntawm kev ua lag luam. Peb muaj peev xwm tsim tau ruaj khov thiab muaj kev pabcuam muaj zog

Peb feem ntau koom nrog tooj liab oxide hmoov, tooj liab chloride, yooj yim tooj liab carbonate, cuprous oxide thiab lwm yam.

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Peb muaj peev xwm cia ntawm 1000 tons ntawm cov khoom tiav thiab pab pawg kws tshaj lij los xyuas kom meej cov khoom xa tuaj raws sijhawm.

Peb muaj kev muag khoom zoo thiab pab neeg tom qab muag.Yog tias koj muaj lus nug txog peb cov khoom, thov koj xav tiv tauj peb.Peb yuav muab cov kev daws teeb meem zoo tshaj plaws rau koj.

Ib txwm ua qauv ua ntej ua ntej ntau lawm; Ib txwm soj ntsuam zaum kawg ua ntej ua zaub mov xa tuaj.