The present invention is supersonic metering method and device for liquid drop.

本发明涉及一种液滴的超声计量方法及装置。

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Voltage metering method, electric test method and device, and method for mfg. semiconductor device and device substrate.

电压测量方法，电测试方法和装置，半导体器件制造方法和器件衬底制造方法。

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The present invention discloses a transformer power consumption metering method in power industry and metallurgical industry.

本发明公开了电力、冶金行业变压器功率损耗计量方法。

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