Tube core concrete was formed with vertical vibrating technique.
管芯混凝土采用立式震动工艺成型；
2
In this paper, a method of measuring the input mechanical impedance of the array element (longitudinal vibrating transducer) with square radiation head by using impulse sound tube is proposed.
本文提出了以声脉冲管测量辐射头为方形的一种阵元(纵向振动换能器)的输入力阻抗的方法。
3
Suitable high frequency magnetic conductive inductor was made through analyzing the high frequency vibrating circuit of electron tube and doing an experiment of magnetic conductive inductor.