A process of alkaline hard chromium plating on aluminum alloy was presented, including oil removal, dipping in heavy metal solution, acid pickling, dipping in zinc solution, hard chromium plating.是什么意思_A process of alkaline hard chromium plating on aluminum alloy was presented, including oil removal, dipping in heavy metal solution, acid pickling, dipping in zinc solution, hard chromium plating.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句