Qingdao Wenrun Holding Co., Ltd. teng Qingdao China ke setsebi marulelong le letangoana tsamaiso moqapi le mofani wa thepa.Re tsepamisa maikutlo tlhahiso le 'maraka oa PVC TPO le membrane ea EPDM bakeng sa tsamaiso ea marulelo, EPDM liner bakeng sa tsamaiso ea letamo.Ka nako e ts'oanang re fana ka ts'ebeletso e le 'ngoe ea lisebelisoa tse amanang le tsona (theipi ea seam, theipi ea sekoaelo, litheipi tsa ho lokisa, sekhutlo se entsoeng esale pele, drainage, scupper, fastener, lipoleiti, bar ea ho emisa, U bar, mechini ea welding, lisebelisoa tsa ho kenya jj) le ho benya bakeng sa motho a le mong. tsamaiso ea marulelo a ply, marulelo a matala a marulelo, tsamaiso ea marulelo a photovoltaic le tsamaiso ea letamo la anti-seepage.