Tianjin Yuantai Derun Group lub square thiab rectangular welded steel kav tau txais AAAAA khoom pov thawj los ntawm lub koom haum ntawm Metallurgical Kev Lag Luam Planning.

Raws li cov kev cai tshwj xeeb ntawm "so assured" rau cov kav dej welded square thiab rectangular rau cov hom phiaj kev tsim kho, cov kav dej steel square thiab rectangular rau cov hom phiaj kev tsim kho dav dav, tus qauv txiav txim siab txog qhov zoo sib xws, cov lus tawm tswv yim zoo, daim ntawv pov thawj khoom, khoom plig hwm ntawm theem khoom, kev muaj peev xwm ua kom zoo ntawm theem lag luam, kev muaj peev xwm tsim kho tshiab, kev ncaj ncees ntawm tuam txhab, qib kev pabcuam, qib kev qhia thiab lwm yam ntsiab lus. Tsom mus rau kev xa cov khoom lag luam zoo thiab tus nqi ntawm cov khoom lag luam, tsim cov qauv kev ntsuam xyuas kev tshawb fawb, tsim nyog, siab heev thiab siv tau, muab lub hauv paus rau kauj ruam tom ntej ntawm cov yeeb nkab welded, lub hom phiaj dav dav txias dov lossis kub dov welded steel yeeb nkab lees paub hom ntawv pov thawj, cog qoob loo thiab tsim cov khoom hlau "assured brand".