Qhuav qhov cub
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DRK-DHG cua tshuab ziab khaub ncaws
Ua nrog cov qib siab laser thiab cov lej tswj cov khoom siv;siv rau ziab, ci, wax melting thiab sterilization nyob rau hauv industrial thiab mining enterprises, kuaj, scientific research units, thiab lwm yam.
