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。
2
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。
3
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.