NF D36-123-2001 家政.燃气器具的外部连接用不包括符合标准NF D 36-121和NF D 36-125的柔性管的波纹金属柔性管
Household economy - Corrugated metallic flexible piping, other than flexible piping to standards NF D 36-121 and NF D 36-125, for the external connection of gas-fired appliances.