若元件加一斜向直线箭头、则是可变量的符号，表示其排量和压力是可调节的。
If the part adds a diagonal straight line arrow, is the variable mark, indicated that its displacement and the pressure are may adjust.
为了满足微波化学反应对功率可变的要求，设计了高功率可调衰减器。
To vary the power of microwave chemistry reactions, a high-power variable attenuator is designed.
文中提出一种可变参数，纠错能力可调的连续输入的RS编码器。
RS encoder with a varied parameter of code and rectified ability is proposed in this paper.
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