指出集中空调冷却水系统为开式系统，一般不适用功率三次方定律，静压头应为冷却塔塔体扬程，并提出了冷却水泵变速时轴功率的计算公式；
Points out that the cubic law of pump power is not valid for the cooling water system of central air conditioning for it is an open system. The static head should be the lift in a cooling tower.
它可直接应用于脉冲半导体激光峰值功率测试，并数字显示。具有中间环节少、测量精度高、适用功率范围大、脉宽范围宽，具有波形监测接口等特点。
It can be used to measure the peak power of diode laser directly. with the characters of digital display, high accuracy, large power range, wide pulse width and output port of waveform monitor.
它可直接应用于脉冲半导体激光峰值功率测试，并数字显示。具有中间环节少、测量精度高、适用功率范围大、脉宽范围宽，具有波形监测接口等特点。
It can be used to measure the peak power of diode laser directly. with the characters of digital display, high accuracy, large power range, wide pulse width and output port of waveform monitor.
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