齿轮齿形采用磨齿加工，齿面采用智能控制渗碳淬火技术，齿轮的强度高、韧性和耐磨性好。
Employing abrasive machining for the form of the gear and intellective-control carburizing and quenching technology for the surface, the gear is with high intensity, strong tenacity and wearability.
表的每一部分都是由他亲手制作，没有使用任何外来的零件——螺钉、弹簧、杠杆、托盘和齿轮、指针以及简洁但是有无数刻度的钟面。
He made the screws, the springs and the levers, the pallets and gears, the hands and the plain, often numberless dials.
大模数重载汽车主减速器盆形齿轮经渗碳淬火后，齿轮齿面经常会出现裂纹。
Cracks frequently generated in basin gear of big modulus main reducer used in heavy load truck after carbonizing and quenching.
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