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The principle of the ultrasonic method applied to measure elastic coefficient is by measuring the velocity of ultrasonic wave propagation in the solid material to obtain the elastic module, shear modulus and poisson ratio.
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摘要弹性系数的超声检测，即借助固体弹性常数与超声波波速间的固有关系，通过测量纵波及横波在固体中的传播速度来获取材料的弹性模量、剪切模量及泊松比。 |
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The principle of three dimensional printing was discussed, and the micro structure, mechanical properties and three dimensions accuracy of the three dimensional printing products were measured; meanwhile, the influence of process parameters on the micro s
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测试了制件的微观组织结构、机械性能以及三个方向上的尺寸精度，分析了各工艺参数对制件微观组织和宏观性能的影响，给出了三维打印成形的应用实例。 |
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The principle of usefulness and economy and of building the country through thrift and hard work must be adhered to in construction in a planned urban area.
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在城市规划区内进行建设，必须坚持适用、经济的原则，贯彻勤俭建国的方针。 |
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The principle of utilizing digital correlation method to detect the phases of the two sine signals with the same frequency was discussed.
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介绍了采用相关分析法测量两路同频率正弦信号相位的数字化方法基本原理。 |
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The principle of voltage controlled tracking filters is introduced and a new design method is presented, which can pick up exterior signals more accurately with high signal-to-noise ratio.
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摘要介绍压控式跟踪滤波器的原理，并提出一种新的设计方法，较高精度地提取外部信号，信噪比高，同时将该方法运用在动平衡机检测电路中。 |
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The principle of voluntariness shall be practised in agricultural insurance. No organization or individual may force any agricultural labourer or agricultural production and operation organization to take out agricultural insurance.
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农业保险实行自愿原则。任何组织和个人不得强制农业劳动者和农业生产经营组织参加农业保险。 |
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The principle of work, design calculation, construction process and site monitoring of the technique in system are analyzed and studied, and the view for study direction hereafter is put forward, which has some reality significance for the study of the so
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摘要对土钉支护技术的工作原理、设计计算、施工工艺和现场监控等环节进行了系统的分析和研究，并提出了今后的研究方向，对基坑土钉支护法的研究具有一定的实际意义。 |
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The principle presented in this paper is of significance to leaf fiber extraction.
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该理论成果对叶脉纤维的提取研究及生产实践具有重要意义。 |
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The principle products include project of complete glazing line, accessory machineries for press/dryer/kiln, deep-processing machine (e.g. polishing machine for glazed ceramic, newest fully automatic gashing machine, high speed miller machine), silicon cy
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公司主要产品包括：印花机、釉线及釉线上配套产品、全自动仿古砖抛釉机、新型划砖(界砖)机、高速超细研磨机、辊筒机辊筒激光雕刻及图案设计等，其产品市场占有率均列同行之首，并销往东南亚、中东、南美洲、非洲等地。 |
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The principle summer sports include cricket, softball, tennis, athletics, swimming, surfing and boating, while golf and horse riding are enjoy though out the year.
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夏季的主要运动项目有，板球、垒球、网球、田径、游泳、冲浪和划船，而高尔夫球和赛马运动全年都深受欢迎。 |
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The principle that object develops is unification of benefit and function.
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事物发展的原则是利益和功能的统一。 |
