1) existing profile
现有断面
2) existing cutout
现有切断
3) virtual section
有效断面
1.
Several kinds of calculating methods of virtual section are analyzed and compared on the basis of measuring wells in four directions by ultrasonic theory,and the experimental results are presented,which has a certain value of reference for improving testing precision.
对于大直径钻孔的成孔质量检测,孔径、孔斜、偏心距是衡量井筒质量的重要参数,在利用超声原理对井筒进行四向测量的基础上,分析比较了几种有效断面的计算方法,并给出实验结果,对提高测试精度有一定参考价值。
4) effective cross sectional area
有效断面积
5) loss of existing service
现有通信的中断
6) Cut-off phenomenon by water surface
水面切断现象
补充资料:异形断面钢材(见异形断面型材)
异形断面钢材(见异形断面型材)
special section steel
,一、u以uu、’“飞豆on gQngC01异形断面钢材(speeial Seetion steel)见异形断面型材。
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