调查人员说，水流入该车辆发动机的进气软管，他们推测空气吸入喷头可能被装得太低。
Water flowed into the air intake hose of the vehicle's engine, said investigators, who speculated the air induction nozzle might have been attached too low.
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.
柔性增强软管由橡胶和塑料制成，主要用于真空，吸入压缩空气，低压流体应用。
Flexible reinforced hoses made from rubber and plastic for vacuum, suction, compressed air and low pressure fluids.
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