Gaseous fuels. Diaphragm domestic meter supports for gaseous fuels. Part 1: Meters placed inside households or inside technical premises placed outside.
气体燃料 气体燃料隔膜式家用仪表支架 第1部分:放置在家庭内部或外部技术场所内部的仪表

2009-06-17

Gaseous fuels. Sizes, connections and superficial finishes of the diaphragm volume gas meters.
气体燃料 隔膜容积式燃气表的尺寸、连接和表面处理

2004-06-18