意大利MADAS马达斯FRG/2MC稳压阀天然气/液化石油气减压阀,mod:RG/2mc DN25 P1 max:1bar稳压阀主要型号RG/2MC RC03DN20稳压阀mod:RG/2mc DN40 P1 max:1bar;RG/2MC RC04 DN25燃气稳压阀; RG/2MC RC05 DN32燃气减压阀mod:RG/2mc DN50 P1 max:1bar;燃气稳压阀RG/2MC RC06 DN40;燃烧机前减压阀型号RG/2MC DN50 RC07;天然气调压阀型号RG/2MC DN65 RC08;液化石油气减压阀