The reasons causing bipolar bum and ways resolving problem during hard grinding of steel ball are dis- cussed,and the product quality is increased.是什么意思_The reasons causing bipolar bum and ways resolving problem during hard grinding of steel ball are dis- cussed,and the product quality is increased.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句