It does have some limitations on value and key lengths, but those are easily adjustable in the code.
它确实对于值和键长度有一些限制，但可以在代码中轻松地调整那些限制。
2
To design and manufacture a constant-source with adjustable amplitude value and the test system, and to realize the examination of zener diode voltage drift parameter, is very important.
设计制作出一个幅值可调的恒流源及其测试系统，实现稳压二极管电压漂移参数的检测，至关重要。
3
It adjusts some technical parameters, such as the output DC voltage adjustable range, efficiency and power factor, wide band noise voltage, static regulation value.