The oilstones produced by our company include brown corundum(A),white corundum(WA),black carborundum(C),green carborundum(GC)etc.是什么意思_The oilstones produced by our company include brown corundum(A),white corundum(WA),black carborundum(C),green carborundum(GC)etc.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句