Ua kom tiav cov cuab yeej siv tshuab
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Environmental Protection Sampling Drilling Rig
Foundation reinforcement tej hauj lwm (steel yeeb nkab pawg)
Environmental pollution site soj ntsuam
Kev saib xyuas ib puag ncig zoo
Lub nroog ntiav underground qhov chaw tshawb nrhiav
Agricultural geological kev tshawb fawb
