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Txheej txheem ntau lawm

Txheej txheem ntau lawm

Cov khoom siv raw

Cov khoom siv raw

Kev ua yeeb yaj kiab

Kev ua yeeb yaj kiab

Txiav

Txiav

Kev sib khi

Kev sib khi

Drilling

Drilling

Kev sib dhos

Kev sib dhos

Inspecting-and-packing

Kev tshuaj xyuas thiab ntim khoom