Has introduced the principle of the air-gap torque method, give the hardware of the ventilator efficiency testing system and illustrated the efficiency testing process.
介绍了气隙转矩法的工作原理，给出了通风机效率现场测试系统的硬件组成，并阐述了效率测试过程。
By use of digital system it can improve the testing accuracy and efficiency, so it provides bases for the laser process research.
利用数字化系统可以有效提高测试准确度和工作效率，为激光加工的研究奠定了基础。
This system can save the cost, improve the testing efficiency and simplify the testing work.
经试验表明该系统能节省成本，提高测试效率，简化测试工作。
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