在逆止器的轴端孔内通过胀套和双平键与从 动轴连接；
The inner part of a shaft end hole of the backstop is connected with a driven shaft through an expansion bush and a double flat key;
其中感应电加热器呈中间具有开孔的双矩形，其是由感应线束缠绕而形成。
The induction electric heater is in a double-rectangular shape with an opening in the middle, and is formed by winding an induction wire harness.
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