Peb qhia txog kev loj hlob thiab qhia cov khoom tshiab rau hauv kev ua lag luam txhua xyoo rau kev tawg ua pov thawj flex conduit,Tawg tawg cov ntaub ntawv hauv pem teb (ntswj hauv pem teb,Tawg Cov Ntawv Pov Thawj Pib Nres Chaw Nres Tsheb,Tawg Cov Khoom Siv Hluav Taws Xob,Tawg Cov Ntawv Pov Thawj Lub TeebCov. Peb cov khoom lag luam muaj cov koob npe siab tshaj plaws los ntawm lub ntiaj teb kev sib tw thiab cov khoom lag luam zoo tshaj plaws rau cov neeg yuav khoom hauv tsev thiab txawv teb chaws. 95% cov khoom xa tawm rau kev lag luam txawv teb chaws.