Nrog ib kauj ruam-rau-kauj ruam ntev ntev, photoelectric nrhiav, raug thiab ruaj khov.Tsis siv neeg suav tuaj yeem teeb tsa suav lub tswb, tsis siv neeg drilling thiab lwm yam khoom siv tswj kev lag luam, kom cov khoom tiav tau ruaj khov thiab zoo nkauj tangent.High efficiency, yog qhov zoo ib puag ncig ...
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