这种无缝管的显著特点是高精度、高光洁度。
This seamless significant feature of high precision and high finish.
介绍一组高精度的半导体激光二极管伺服控制电路。
Introduce a set of high stable servo circuit for semiconductor laser diode.
利用电子补偿方法，采用运算放大器和晶体管研制成了高精度、小变比电流互感器误差补偿装置。
Based on electronic compensation, the error compensation device used in high precision and small ratio current transformers is developed with operational amplifiers and transistors.
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