标准气体减压阀，标气，混合高，纯气，2升，4升，8升小钢瓶 调节器

　　W21.8RH右旋

　　材质:不锈钢，黄铜

　　应用:非甲烷总烃，药典二氧化碳中碳氢化合物

　　Standard gas pressure reducing valve, standard gas, mixed high, pure gas, 2-liter, 4-liter, 8-liter small steel cylinder regulator

　　W21.8RH right-hand rotation

　　Material: stainless steel, brass

　　Application: Non methane total hydrocarbons, hydrocarbons in pharmacopoeia carbon dioxide