±12 L~(1/2) is adopted as "the dual tolerances" in repetition measurement of the basic benchmark of a hydrometric station in China,which means ±12 L~(1/2) is not only the tolerance of round-trip survey elevation difference values,but also the tolerance between the new and old elevations after the measurement.
我国水文行业复测水文站的基本水准点采用±12 L~(1/2)作为"双重限差",也就是把±12 L~(1/2)既作为往返测量高差不符值的限差,又作为复测后新老高程之差的限差,这是个大误区,前者的限差是±12 L~(1/2),后者的限差应为±20 L~(1/2)。
Performance Evaluation of E-Purchasing Based on Benchmarking;
基于水准基点法的电子采购绩效评价
Discussion on Repetition Measurement of Basic Benchmark of Hydrometric Station
浅谈水文站基本水准点的复测与考证问题
Use to add up to 4 horizontal baseline dimensions. Attach one endpoint to baseline and one to first feature.
用于添加多达4个水平基准线尺寸。将一个端点连接到基准线，一个端点连接到第一个部件。
The Selection Method of Decision-making Datum Mark During Anti-torpedo Time;
水面舰艇对抗鱼雷攻击时决策基准点的选取方法
ullage reference-point
储罐空高计量基准点
instrument landing system reference point
仪表着陆系统基准点
outage reference point
油罐空高量油的基准点
Chart datum transfer techniques
海图基准点转换技术
The Fed's decision means the federal fund rate is kept at the 1.75 percent level.
联准会的此一决定使得联邦基金利率保持在百分之一点七五的水准。
Suggestion on improvement of flood standard of cascade reservoirs
对梯级水库洪水标准的一点改进建议
Use to add up to 4 horizontal ordinate dimensions. Attach one endpoint to baseline and one to first feature.
用于添加多达4个水平坐标尺寸。将一个端点连接到基准线，一个端点连接到第一个部件。
metre above Principal Datum [mPd]
主水平基准以上……米
A critical temperature of water is 1009=C, its boiling point at standard atmospheric pressure.
在标准大气压力下，水的沸点为1009=C
A critical temperature of water is100=C, its boiling point at standard atmospheric pressure.
在标准大气压力下，水的沸点为100＝C
It' s one o' clock. The tide must be in.
一点钟了. 潮水准已涨上来了.
Probe and concepts of Improving Student s Writing Standard;
提高学生作文水准的几点探索与构想
Analysis of Guidelines for Deriving Water Quality Criteria in the United States and Construction of Related Criteria in China
美国水质基准技术分析与我国相关基准的构建
Standard for basic terms used in design of water supply and sewerage engineering
给水排水设计基本术语标准