1) second grade leveling
二等水准
1.
But there are few discussions on the replacement of second grade leveling.
人们以往对全站仪中间法三角高程测量代替三、四等水准测量讨论较多,对代替二等水准测量的问题则较少涉及。
2.
The result is successful and can meet requirements on precision of second grade leveling.
从精密三角高程测量的原理入手,分析了精密三角高程测量中对向观测法的精度,并将该方法应用于武广客运专线大瑶山隧道群段高程控制测量,使测量结果达到了二等水准测量的精度要求。
2) second-class level web
二等水准网
1.
This paper discusses and demonstrates these problems, such as the basic conditions and antinomy in using of the older second-class level web of Wuhan urban, the implement and its precision of remeasurement web, and the significance of elevation-transformation and etc.
武汉市原二等水准网的基本状况和使用的矛盾、复测网的实施和精度、高程变化的地学意义等几个有关问题进行了分析,从而认为,进行周期复测和增设基岩水准点对提高水准网精度有着十分重要的作用。
3) second grade leveling
二等水准测量
1.
Method of the trigonometric leveling replacing the second grade leveling;
探讨三角高程测量代替二等水准测量的方法
2.
This paper introduces the important of second grade leveling for setting up of the construction control of pump storage hy-dropower stations.
针对抽水蓄能电站施工控制网的特点,论述了用二等水准测量进行高程控制的必要性,对泰安、桐柏和宜兴三个网的水准高程控制测量设计、实施和成果进行了比较分析。
4) first and second leveling surveying of underground
地铁一、二等水准
5) second-order bench mark
二等水准标点
6) Standard mercury-in-glass thermometer(Grade Ⅱ)
二等标准水银温度计
补充资料：长等短等
1.犹言左等右等。谓等待久。
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