它是一款非常小巧的真空管，形状和大小如浴缸塞，内含一个柱塞和弹簧，由两个小型空气软管连接。
It was a small vacuum chamber, about the size and shape of a bathtub stopper, that contained a plunger and spring, and had two small air hoses attached to it.
当引擎冷却时，通过出口软管吸入空气，在真空管产生吸气，导致柱塞向下挤压弹簧。
The engine, as it cooled itself, sucked in air through the outlet hose, producing suction in the vacuum chamber, and so drawing the plunger down and compressing the spring.
朝散热器方向按压冷却液软管几次，使其靠近henn管接头，从而确保固定弹簧与侧散热器上的锁紧装置完全接合。
Press the coolant hose towards the radiator several times close to the henn coupling to ensure that the retainer spring is fully engaged in the lock on the side radiator.
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