This Paper gives a design methodology of simple portable virtual oscilloscope and signal generator, and explained its software and hardware explicitly.
给出了一个简单便携式虚拟示波器及信号发生器的设计方法，从软件到硬件两方面做了详细阐述。
The invention discloses a water sampler which is simple, portable and easy to operate. Users can collect water samples in different locations and at different depths by the bank.
本发明是一种简单便携，易于操作的水样采集装置，使用者在岸边就能实现对不同位 置、不同深度的水样进行采集。
Its main characteristic is simple, portable, fast and secure.
它的主要特点是：简单、可移植、速度快及安全。
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