wanda aka yi ta hanyar simintin ƙarfe wanda za a iya amfani da shi sosai a yawancin masana'antu kamar su sarrafa ruwa, masana'antar mai da iskar gas da sauransu.Max.matsa lamba 16 bar. A matsayin mai ƙera bawul ɗin malam buɗe ido, COVNA tana ba da bawul ɗin wafer/flanged/lugged/abinci-amintaccen bawul ɗin malam buɗe ido a cikin simintin ƙarfe, bakin karfe da kayan PVC don zaɓinku. Tuntube mu don samun ƙarin bayani!