The engine was crawling with vacuum lines and sensor wires, and Nick's confidence had fallen to the point of sending me to Caldor for a Polaroid camera.
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.
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。
3
The piezoelectric sensors can also be used to measure the internal combustion engine measure pressure and vacuum measurement.