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principle and apparatus
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  原理和装置
     This paper describes the basic principle and apparatus of CO2 laser stabilized by saturated resonance with 4.3 μm fluorescence.
     本文描述利用4.3μm荧光饱和共振稳定CO_2激光器频率的基本原理和装置
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     The measurement principle and apparatus of time spectrum of γ ray exposure rate by the pinhole technique are described,and some real measurement results of time spectrum of γ ray exposure rate have been obtained. It provides a measurement method and a set of reference data for the studies of the nuclear radiation energy.
     叙述了应用针孔技术测量γ射线辐照率时间谱的原理和装置,并获得了γ射线辐照率时间谱的实测结果,为核辐射能量研究提供一种测量方法和一组参考数据。
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  “principle and apparatus”译为未确定词的双语例句
     The principle and apparatus for measuring the heat conductivity of rubber composite with the quasi steady state method were described;
     介绍了准稳态法测量橡胶复合材料热导率的原理和试验装置;
短句来源
     Experiments of 19F(p,αγ)16O prompt nuclear reaction analysts of tea F contents were performed on a Cockroft-Walton accelerator. The principle and apparatus are described. More than 150 varieties tea samples were examined.
     本文介绍了在400kV高压倍加器上,利用~(19)F(p,αγ)~(16)O瞬发核反应测量国内150余种茶叶样品含氟量的原理及实验装置,给出了一批典型的测量结果。
短句来源
     The measuring principle and apparatus are introduced and the measuring accuracy is disCussed.
     介绍了测量原理、测量装置,讨论了测量误差。
短句来源
     The principle and apparatus for measuring sulfur content in petroleum and its products by radioisotope X-ray method are described.
     本文阐述放射性同位素X射线吸收法分析石油及其产品硫份的原理及仪器,还讨论了若干技术问题。
短句来源
     The basic principle and apparatus of measuring oxygen potential in molten iron were described.
     综合分析了氧电势法的基本原理及测定装置。
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     The principle.
     介绍这一系统的原理、构造及操作。
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     The principle of G.
     介绍了ITU T建议中G.
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     characteristic and principle;
     特色与原则;
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     and "preventive principle".
     “和”预防性原则”成为热门话题。
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     3. Apparatus;
     3.主要仪器
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The principle and apparatus for measuring sulfur content in petroleum and its products by radioisotope X-ray method are described. Two different ranges (0-4 wt% and 0-2 wt% sulfur) could be used with the apparatus. Analysis accuracy-1% of full scale; time constant-60 sec. This method is characterized by quickness, accuracy and ease of operation.

本文阐述放射性同位素X射线吸收法分析石油及其产品硫份的原理及仪器,还讨论了若干技术问题。该仪器的量程分2%和4%两档,时间常数60秒,分析精度为满量程的±1%,样品称重后经5分钟即可读数。整个方法具有快速、准确、操作简便等特点。

This paper describes the basic principle and apparatus of CO2 laser stabilized by saturated resonance with 4.3 μm fluorescence. The linewidth and resonant depth of the Lamb dip have been measured. The relationships between derivative signals (1st and 3rd) and the modulated bandwidth as well as the temperature of the absorbing cell are determined by experiment. The beat-counting measurement results show that the frequency stability of CO2 laser is 2×10-10 (10s) and the reproducibi-lity is better than 1×10-9....

This paper describes the basic principle and apparatus of CO2 laser stabilized by saturated resonance with 4.3 μm fluorescence. The linewidth and resonant depth of the Lamb dip have been measured. The relationships between derivative signals (1st and 3rd) and the modulated bandwidth as well as the temperature of the absorbing cell are determined by experiment. The beat-counting measurement results show that the frequency stability of CO2 laser is 2×10-10 (10s) and the reproducibi-lity is better than 1×10-9.

本文描述利用4.3μm荧光饱和共振稳定CO_2激光器频率的基本原理和装置。测量了4.3μm荧光兰姆凹陷的宽度和深度,确定了其一阶、三阶微分信号与调制宽度、吸收室温度等参数的关系。拍频测量结果表明,其频率稳定度为2×10~(-10)(10s),复现性优于1×10~(-9)。

Experiments of 19F(p,αγ)16O prompt nuclear reaction analysts of tea F contents were performed on a Cockroft-Walton accelerator. The principle and apparatus are described. More than 150 varieties tea samples were examined. Results show that for the same variety of tea samples, the higher the grade of the tea, the higher the F concentration it con-tains, and for different varieties, the better the tea, the lower the F concentration of the tea.

本文介绍了在400kV高压倍加器上,利用~(19)F(p,αγ)~(16)O瞬发核反应测量国内150余种茶叶样品含氟量的原理及实验装置,给出了一批典型的测量结果。结果表明:同一品种的茶叶,茶的品级数越大,含氟量越高;茶叶的品种越好,含氟量越低。

 
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