Lwm yam cuab yeej drilling

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Yog tias koj tab tom nrhiav Tuam Tshoj drilling cov cuab yeej yees patented thiab drilling yam cia muag rau Suav teb ntawm kev drilling cuab yeej tsum thiab koom xwm zoo, thov cuag hu Rejee kev lag luam.
Khoom Daim ntawv teev cov