我们最近拿到一电源样机，
面板指标：input 60-250ACV (不同于常规的85-265VAC）
Output DC 1.5-22VDC 2A
液晶显示，显示有：
SPEED, FOLLOW THROUGH, DUTY CYCLE, and VOLTAGE
没理解其意思，敬请各位高手给以指点
下面是网上查的信息：
The full turning power of the Power allows you to deliver a clean and stable voltage.
The full switching regulated power supply delivers the ability to fine tune your machine to the perfect setting.
The LCD Meter accurately, clearly, continuously displays
the four major electronic measurements from a tattoo machine:
SPEED, FOLLOW THROUGH, DUTY CYCLE, and VOLTAGE.
Instructions included.
It will run any machine better than most other power supplies while the blue back-lit LCD clearly and accurately displays the four major electronic measurements from any machine.
The speed of the machine is prominently displayed. Machine speed is the most important factor in how a machine works for you. Even a change of five cycles per second will change machine function - but is undetectable without a meter.
The duty cycle display shows how much back spring pressure your machine has in relation to front spring hardness. This is vital to know when you are tuning a machine and will let you see at a glance if you need to change springs.
The voltage is displayed to two decimal places. The follow through display shows how cleanly the contact points are opening and closing. The Cyclone Power Supply delivers clean, stable power with full current and thermal overload protection through a precision ten-turn voltage control.
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