case harden 表面硬化
V to form a hard surface layer of high carbon content on (a steel component) by heating in a carburizing environment with subsequent quenching or heat treatment 表面硬化 [metallurgy]
Sugar-coated haws is a traditional Chinese food, it is the string of wild fruit clusters with the bamboo stick dipped after the maltose thin, taffy case of wind quickly harden.
冰糖葫芦是中国传统美食，它是将野果用竹签串成串后蘸上麦芽糖稀，糖稀遇风迅速变硬。
Typical materials include ductile iron castings or steel forgings. Most crankshafts require some form of heat treating including case hardening, nitriding and induction harden.
特殊的材料包括球墨铸铁和钢煅品，大部分机轴经过热处理，表面硬化、渗氮和感应淬火。
After using, keep Chamois in the case supplied or just put Chamois at ventilated place. Chamois will harden to protect itself from germ and mildew to keep hygienic.
使用后，请将仿鹿皮巾洗净放进附送的塑料盒子中或者将仿鹿皮巾放置于通风处。仿鹿皮巾失去水分会变干硬，可以防止细菌侵入保持卫生。
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