This new study builds upon research by several groups who pioneered the light-echotechnique.
这一新的研究建立在数个处于光回声技术前沿团队的研究之上。
2
The Methodological investigation on the measurement of thickness of downhole casing with ultrasonic pulse echotechnique is carried out both in theory and in experiments.
利用理论分析和实验模拟的方法研究了超声脉冲反射技术测量井下套管厚度的方法。
3
1 echo principle of office decoration, ceiling and floor decoration and other parts, with the first echotechnique, not only have to form, can produce the corresponding effect.