Indication variation of tachometer 转速表示值变动性
The first aspect expresses the relationship between the structure pattern and grade variation of an indication which is called relative difference of weight values of the indication.
第一方面表征一个标志的构形与等级变化之间的关系，称为标志权相对差。
It has two functions of manual operation and automatic operation, The blender is speed variation. It is equipped with end-point indication light buzzer and automatic lock equipment.
有手动、自动两种操作动能，自动指示终点。搅拌速度无极调动，设有终点指示，蜂鸣报警。
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