Effect of Waveform of Pulse Electric Current and Cooling Conditions on Microstructure and Properties of Hard Anodic Oxidation Coating of Motor Aluntinum Piston是什么意思_Effect of Waveform of Pulse Electric Current and Cooling Conditions on Microstructure and Properties of Hard Anodic Oxidation Coating of Motor Aluntinum Piston在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句