| 摘要 |
An oxygen sensor to be used with internal combustion engines, in automobiles, etc.. The sensor includes a solid electrolyte tube with a closed tip, an outer and an inner electrode respectively formed on the outside and the inside of the electrolyte tube, a housing to hold the tube, electrically conductive means to take out the electrical output of the inner metal electrode, a cover supported by the housing; an air passage in an end opening of the cover; and a multi-layer heat-resistant filter with a low rate of thermal expansion in the air passage.
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