fullprof A complex variable has real and imaginary parts written in the form b(x) = n(x) + iv(x) for two real-valued functions n(x) and v(x)

单复变量包含实数和虚数两部分，针对两个实值函数n(x) 和 v(x)的表达式为：b(x) = n(x) + iv(x)。

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The two sealing machine hot and cold, stable, easy to tear cut incision can be divided into even, set variable speed, photoelectric tracking functions into one, easy to operate.

本机采用冷热两道封口，性能稳定，分切易撕切口、可分可连、集无级调速、光电跟踪等功能于一体，操作方便。

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