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SUCTION TUBE, UREA SENSOR WITH A SUCTION TUBE AND SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM WITH A UREA SENSOR AND A SUCTION MECHANISM AND SUCTION TUBE
SUCTION TUBE, UREA SENSOR WITH A SUCTION TUBE AND SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM WITH A UREA SENSOR AND A SUCTION MECHANISM AND SUCTION TUBE
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机译:吸气管,带吸气管的尿素传感器以及带尿素传感器和吸气机理和吸气管的选择性催化还原(SCR)系统
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摘要
A suction tube for a urea sensor installed in a urea tank comprises a suction pipe and a cover. The suction pipe has a suction opening and a hole extending through a wall of the suction pipe. The cover is disposed on an outside of the suction pipe and covers the hole. When there is an under-pressure in the suction pipe compared to the urea tank, the cover abuts the suction pipe and seals the hole. When there is an overpressure in the suction pipe compared to the urea tank, the cover deforms and allows an excess urea solution to escape through the hole and flow back into the urea tank.
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