Qab nthab T Grid Luv Taw Qhia Qab nthab T daim phiaj thiab lub teeb steel keel yog qhov tseem ceeb thav ntawv thiab cov khoom siv rau kev teeb tsa cov pob zeb fiber ntau qab nthab, gypsum board thiab fiberglass board.Peb tuaj yeem phim qhov kev teeb tsa tiav rau koj, raws li qee qhov kev faib ua feem, los pab koj ea ...