1) critical stage
关键阶段
1.
Several critical stages in the construction of foreign aid pricing tender
援外报价标编制中的几个关键阶段
2) Critical phase of flight
飞行关键阶段
3) key area
关键地段
1.
Recognition and analysis of the key area for ecological security is an important link in the regional pattern for ecological security designing.
生态安全关键地段的识别与分析是区域生态安全格局设计中的重要环节。
4) Key pipe
关键管段
5) essential navigation section
关键航段
1.
It discusses and researches the river-sea direct link ship handling skills of essential navigation sections from how to pass a curving section of river,a bridge and an estuary.
通过对江海直达船舶的操纵性分析,从过弯曲河段航法、过桥航法、入海河口的航法三方面对关键航段江海直达船舶驾驶技术进行了探讨与研究。
6) key frequency band
关键频段
1.
Firstly, the UDWT is adopted for signal frequency analysis to determine the key frequency bands containing fault information; then, correlation dimension analysis of effective sub-waves is performed, and the correlation dimension threshold criterion is set up in sensi.
该方法首先采用UDWT对振动波形进行分频,并确定含缺陷信息的关键频段;再对有效子波实施关联维分析,在敏感尺度区间内设立关联维阈值判据,进行缺陷检测。
补充资料：关键
①门闩或功能类似门闩的东西。②比喻事物最关紧要的部分；对情况起决定作用的因素：摸清情况是解决问题的～丨办好学校～在于提高教学质量。③最关紧要的：～问题丨～时刻。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条