KS M ISO 8988-2020 Plastics-Phenolic resins-Determination of hexamethylenetetramine content-Kjeldahl method, perchloric acid method and hydrochloric acid method
2020KS M ISO 8988-2020 Plastics-Phenolic resins-Determination of hexamethylenetetramine content-Kjeldahl method, perchloric acid method and hydrochloric acid method
2010KS M ISO 8988:2010 Plastics-Phenolic resins-Determination of hexamethylenetetramine content-Kjeldahl method, perchloric acid method and hydrochloric acid method