This paper introduces structure of all-plastic commutator and its cold extrusion moulding technics, emphasizes on the essentials in its mould design.是什么意思_This paper introduces structure of all-plastic commutator and its cold extrusion moulding technics, emphasizes on the essentials in its mould design.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句