1. Cross-section ovalization is one of the flaws in the thin-walled tube NC bending process.
   截面畸变是薄壁管小弯曲半径数控弯曲成形容易出现的成形缺陷之一。
2. Using an example,the dominancy of the present optimization method is testified in improving the efficiency of NC machining and cutting manufacture cost.
   通过实例验证此优化方法在孔群加工中明显提高了数控加工的效率、降低了加工成本。
3. However,the passive film on Fe-20Cr NC was a n-type semiconductor which had a higher transpassivation potential and therefore higher resistance to pitting corrosion.
   而纳米晶涂层在两种溶液体系中形成的钝化膜均为n型半导体。
4. Through analyzing and accounting evocable error of tool's transmutation during milling process,the compensatory method to the error in NC machining has been put forward.
   通过分析计算数控铣削过程中刀具变形引起的误差,提出对这种误差的补偿方法。
5. However, NC devices have high prices and there’re some volatile factors when NC system is under the practical operation, which incumber the testing and operation process.
   但数控设备的成本较高，同时数控系统在实际运转过程中存在一些不稳定因素，给运行调试工作带来不便。
6. C7620-11 semi-automatic chuck multicut lathe was reformed into a kind of simple constructed NC machine,so that the variety of process was increased ,and automation degree was also improved.
   通过对C7620-11夹盘多刀半自动车床的改进,扩大了加工种类,提高了自动化程度,使其成为一台简易型数控车床。
7. Abstract: C7620-11 semi-automatic chuck multicut lathe was reformed into a kind of simple constructed NC machine, so that the variety of process was increased ,and automation degree was also improved.
   摘 要: 通过对C7620-11夹盘多刀半自动车床的改进，扩大了加工种类，提高了自动化程度，使其成为一台简易型数控车床。
8. To increase the precision of the electric igniting parameters of common fusehead, a kind of wrapper such as NC or CMC,can be used to wrap the bridge wire in common fuse head .
   为了提高普通点火头发火参数的精度,可以在桥丝上涂覆一层硝化棉或羧甲基纤维素的涂层。

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