The phase coincidence phenomena is a especial phase relation between two frequencies, and usually can be used in high precision instruments design.
相位重合是两个频率信号的一种特殊相位关系，利用它往往能设计出高精度的仪器。
The design factor for temperature field of instruments and selection on precision temperature control circuits are introduced in detail.
详细介绍了仪表温度场的设计要素及精密温控线路的选择。
R&D Division has ability to design and research the precision measuring instruments, calibration standards, management software of lab and calibration technical methods.
设计开发精密测量仪器、计量标准、实验室管理软件、校准技术方法，同时也对外承接各种产品开发业务。
R&D Division has ability to design and research the precision measuring instruments, calibration standards, management software of lab and calibration technical methods.
设计开发精密测量仪器、计量标准、实验室管理软件、校准技术方法，同时也对外承接各种产品开发业务。
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