然而，圆桶形阳极加工周期长，适应性差。
However, cylindrical anodes have weaknesses such as long processing cycle and poor suitability.
双半内圈四点接触球轴承结构复杂、设计周期长、加工难度大。
Single row angular contact ball bearing with two piece inner ring has complex construction, long design cycle, great difficulty in processing.
在模具纹路加工中，传统的化学蚀刻方法存在污染大、加工周期长的缺点。
In the processing of the mold texture, the traditional chemical etching exits the shortcomings of the pollution and the long processing cycle.
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