The hardness gradient, depth , microstructure and phases of nitrided layers were measured with Microhardness Apparatus, Microcopy and X-ray diffractometer .是什么意思_The hardness gradient, depth , microstructure and phases of nitrided layers were measured with Microhardness Apparatus, Microcopy and X-ray diffractometer .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句