GOST 32318-2012 Roofing and hydraulic-insulating flexible bitumen-based and holymeric (thermoplastic or elastomer) materials. Method for determination of water vapour transmission properties
2012GOST 32318-2012 Roofing and hydraulic-insulating flexible bitumen-based and holymeric (thermoplastic or elastomer) materials. Method for determination of water vapour transmission properties