NF D36-112:2014
家庭经济. 使用单个瓶装或罐装丁烷或丙烷的家用器具外部连接用增强挠性硫化橡胶管以及(增强)挠性热塑管
Household economy - Reinforced flexible vulcanized rubber piping and (reinforced) flexible thermoplastics piping for the external connection of domestic appliances using butane or propane from individual cylinders or tanks