case hardened

常见例句

Case Hardened : a case hardened fastener is a fastener of ferrous material having a suce which has been made harder than the core.
外貌硬化：外貌硬化的緊固件是玄色金屬，其外貌經過処理後比內心硬度要高。
Case Hardened : a case hardened fastener is a fastener of ferrous material having a surface which has been made harder than the core.
表麪硬化：表麪硬化的緊固件是黑色金屬，其表麪經過処理後比內心硬度要高。
blog.sina.com.cn
Generously dimensioned ball or roller bearings, case hardened forged and ground gears, and internally and externally reinforced gearboxes ensure a long, low maintenance service life.
大尺寸滾珠或滾子軸承，表麪硬化偽造和地麪齒輪，齒輪箱內部和外部強化確保長，維護成本低使用壽命。
www.lei-de.com