传统气道研发采用经验设计和稳流试验相结合的方法，研制周期长，且难以得到理想方案。
Based on experiential design and steady flow test, the traditional port design method needs a long developing period, moreover is hard to get the ideal scheme.
传统气相色谱法检测油中溶解气体存在分析环节多、操作频繁、试验周期长、误差大等弊病。
The traditional gas chromatography for testing dissolved gas in transformer oil has the disadvantage of multiple analytic links, frequent operation, long testing cycle and large errors.
变速器总成台架疲劳寿命试验周期长，并且要求其在一定温度、载荷下进行。
The skid bank fatigue life test of automobile transmission assembly has a long periodic time, which should go on under certain temperature and load.
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