The membrane electrode assembly (MEA) in proton exchange membrane fuel cell (PEMFC) was composed of the proton exchange membrane, catalyst layer, water management layer(WML) and diffusion layer.是什么意思_The membrane electrode assembly (MEA) in proton exchange membrane fuel cell (PEMFC) was composed of the proton exchange membrane, catalyst layer, water management layer(WML) and diffusion layer.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句