當(dāng)加熱時，本體內(nèi)的蠟膨脹，膠管受蠟擠壓，推動推桿向上運動，產(chǎn)生升程和推動力當(dāng)冷卻時，彈簧推動推桿回位。
When heated, the wax in the cup expands and the pressure applies, via the sleeve, both a radial force and an axial force on the piston.Again, an external spring ensures the return of the piston when the temperature decreases.