If the part adds a diagonal straight line arrow, is the variable mark, indicated that its displacement and the pressure are may adjust.
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.
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。
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