Nws yog ib hom khoom siv dav siv, uas tuaj yeem siv ntau hom cement slurry systems thiab muaj kev sib raug zoo nrog lwm cov khoom siv ntxiv.
Nws muaj qee qhov kev xav tau nrog cov dej sib tov thiab tsis yog tsuas yog siv tau rau hauv cov dej qab zib cement slurry, tab sis kuj tseem siv tau rau hauv dej hiav txwv cement slurry.
Post lub sij hawm: Dec-17-2018