Yuav ua li cas nqes los ntawm sandwich panels sawv tawm ntawm ntau yam ntawm cov khoom tiav? Yuav ua li cas ua kom lub installation ntawm txoj kab nqes los ntawm sandwich panels nrog koj tus kheej txhais tes? Dab tsi yog qhov txaus nyiam ntawm kev ua tiav qhov chaw nrog cov sandwich panels?