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  accuracy is 2
     Proved though laboratory tests, tracer's measuring accuracy is 2%~3% pore volume, which can meet the requirements of waterflooding development of mature oilfields and evaluation of tertiary recovery.
     经实验室试验证实 ,示踪剂测试精度为 2 %~ 3%孔隙体积 ,可满足老油田水驱开发和三次采油评价等工作的需要。
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     The controller presents good characteristic in maintaining constant current, the system accuracy is 2 percent, and can diagnose by itself and protect at the time of electric failure.
     该控制器采用单片微机控制电焊机实现闭环恒流效果 ,其控制精度为 2 % ,并具有完善的故障自诊断、自适应和保护功能
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     The controller presents good characteristic in maintaining constant current,the system accuracy is 2 percent, and can dagnose by itself and protect at the time of electric failure.
     该控制器采用单片微机控制电焊机实现闭环恒流效果 ,其控制精度为 2 % ,并具有完善的故障自诊断、自适应和保护功能
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     The theoretical curve with the experimental one is compared,and that nonmetal medium tested by this method is practical. The measurement range for this method is 0~20 cm,the measurement accuracy is 2.5 mm.
     将理论与实验曲线进行比较,得知用该方法检测非金属的厚度具有可行性,其测量的厚度范围为0~20 cm,测量精度为2.5mm。
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  precision is 2
     The dissection of the sample proves that the core end thickness is 0. 1 mm and the location precision is 2 mm.
     经解剖验证,元件芯体尾部减薄区定位分辨最小厚度为0.1mm,定位精度为2mm。
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     The measurement precision of this method shows that the relative error of F-P etalon spacing will be 4×10-4 when precision of angle is 30" and optical spectrum analyzer precision is 2 GHz.
     当角度测量精度为30″,光谱仪精度为2 GHz时,该方法测量F-P标准具间距的相对误差为4×10~(-4).
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  “精度为2”译为未确定词的双语例句
     the repeat position accuracy 2.0μm.
     复位精度为2.0μm。
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     Detection limits ranged from 1.99 to 28.8ng/g for different eelements and the precision ranged from 2.1% to 8.1%.
     各元素检出限均在1.99~28.8ng/g之间,测量精度为2.1%~8.1%。
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     The analytical precision of the method corresponds to 2.9% of RSD, when the concentration of Mo at 0.01%.
     当Mo的含量为0.01%时,本方法的分析精度为2.9%。
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     The accuracy of determined quasi-geoid with 2.5'×2.5' resolution is 2.2cm by the external check.
     通过检核,所确定的2.5'×2.5'似大地水准面精度为2.2cm。
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     Experiments explain that measurement precision of inclined angle is not exceeded 0.04° within ±10° and that of inclined azimuth is not exceeded 2.253° within 0°~360°,it can meet a demand for construction of pile base.
     实验结果表明倾斜角在±10°范围内,其测量精度为0.04°; 方位角在0°~360°范围内,其测量精度为2.253°,可以满足桩基础施工的技术要求。
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  accuracy is 2
By applying the concept of incremental range we have derived the electronic stopping power,Se, with a precision of about 1%; the estimated accuracy is 2%.
      
Mean navigation accuracy is 2.4 ± 0.8-3.3 ± 0.8 mm.
      
The accuracy is 2-3 mm in the lateral and 1 cm in the frontal direction.
      
  precision is 2
The precision is 2.3-4.8% in the series and 3.5-5.4% between the days.
      
The detection limit is 20 ng/ml and within-and between-assay precision is 2.6% resp.
      
The sensitivity of this assay is 0.26 U/ml, whereas the intraassay precision is 2.6% and interassay precision is 5.8%.
      


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在进行野外调查工作中,常常由于没有简便而精确的测高仪器(一般空盒气压计,测高误差较大),因此不能获得准确的高度数据,大大影响了工作的进行和质量。为了解决这个问题,我们研究了Д·Н·门捷列夫(1874)所发明的差示气压计的原理以及前人根据这种原理所制成的测高仪器,改进了仪器的装置,制成了一种简便而精度较高的测高仪器。仪器一次能测120米的高差,精度为±0.5米,个别情况出现±0.8米。仪器的使用很简便而计算快速,一般测量高差120米的地形,往返观测两次,只需20余分钟,计算时间约数分钟即可。仪器具有轻巧的特点,其外壳体积为9.3×7.4×16cm,重量为1.25市斤。仪器构造简单,制造容易而造价低廉,每个约需人民币10余元。

:

随着摄影测量解析法的迅速发展,立体坐标量测仪上的自动读数设备已成为必不可少的部件。本文讨论了记录设备中的几个主要问题,并提出二个方案。所设计的读数设备不但可以与新设计的立体坐标量测仪连成一体,而且可以附加在已有的立体坐标量测仪上,不会破坏原有仪器结构和损害仪器精度。读数时间为3秒,记录时间为30秒。读数精度为±3μ。并配置有打印记录和五单位编码穿孔等设备。

This article is intended to make an analysis of and comparison betweenthe commonly used "constant load" measuring method and the "constant deformation'' method adopted in GLP-1 Tester. The characteristics of the load measuring method of the tester and the method of load computation have been described. Also, the problems of design, manufacture and adjustment o{ optical measuring instruments have been discussed. And, besides an analysis of all stress factors, a brief explanation of how to check mobile load accuracy...

This article is intended to make an analysis of and comparison betweenthe commonly used "constant load" measuring method and the "constant deformation'' method adopted in GLP-1 Tester. The characteristics of the load measuring method of the tester and the method of load computation have been described. Also, the problems of design, manufacture and adjustment o{ optical measuring instruments have been discussed. And, besides an analysis of all stress factors, a brief explanation of how to check mobile load accuracy and increase the tester's stress measuring accuracy has been offered.

本文对通常采用的“恒载荷”测量方案与GLP—1型试验机采用的“恒变形”测量方案作了分析比较。阐述了该试验机载荷测量方案的特点及载荷计算方法。讨论了光学测量装置的设计问题与制造调整中的问题。文中对应力误差因素进行了逐个分析。介绍了动载荷精度的检查方法及结果。讨论了提高试验机应力精度的问题。 GLP—1型高温真空拉压疲劳试验机可作棒材和板材试件的对称与不对称应力拉压疲劳试验。最大交变载荷为±1000公斤,机器动载荷精度在6%范围内;工作频率为100~400/Hz工作温度为800~1300℃;控温精度为0.5%;试件均热带在10mm长度内温差为10℃以内;真空度为5×10~(-5)mmHg。 试验机由主机、高温真空炉和电气控制三大部分组成。图1为试验机全貌。图2为试验机工作示意图。 本文将主要讨论本试验机的载荷测量与应力精度问题。有关本机的其他方面的问题可参阅有关资料[1]。

 
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