| 摘要 |
A knob for the cover of a pan or similar container which is used for waterless cooking. The knob is installed in an opening formed in the pan cover. A vent passage extends from the pan cover opening to an outlet in the lower peripheral portion of the knob. A disc is provided for closing the vent passage and a slidable tubular housing is provided with lifting surfaces to lift the disc and open the vent passage. The knob can be partially disassembled for cleaning by rotation of the outer tubular housing.
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