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Txhua tus neeg hauv peb pab neeg yog ib tus engineer zoo heev.Peb yog cov kws tshaj lij thiab peb ua siab ntev.Peb muab kev pabcuam tsim qauv thiab kev pabcuam kev kos duab. Peb yuav muab cov lus teb sai rau koj cov lus nug ua ntej lossis tom qab muag.Peb nyob ntawm no, tos koj !!
