安装基准圆 installation fundamental circle
标准圆钻型切工 ideal round brilliant cut
照准圆 aiming circle
基准圆周长 [机] datum circumference
基准圆 Basic circle ; director circle ; reference circle
照准圆筒 sighting cylinder
标准圆筒试样 standard cylindrical specimen
校准圆盘 Calibration Disc
标准圆形明亮式 Standard Round Brilliant
校准圆 [测] calibration circle
该系统用零矢量分割的准圆轨迹法生成pwm波形。
PWM wave is generated by splitting Zero vector quasi circular locus method.
提出了一种新的适合于GTR电流型变频器整流器部分的PWM控制方法，推导出了在准圆轨迹PWM控制规律下，整流器输出电压的计算公式和平波电抗器电感量计算的实用公式。
A new PWM control method for GTR current source rectifier is presented. The mathematical formulae that output voltage of the rectifier and inductance of the DC filter are derived.
本文给出了粘弹性基支粘弹性圆（环）形薄板准静态弯曲的一般解法。
In this paper, a general solution for quasistatic bending of viscoelastic circular (ring) thin plate rested, on viscoelastic foundation is given.
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