| 摘要 |
A translucent conical member passes light therethrough from a lamp positioned within the member. When an annular carburetor filter is positioned on the member, the light passes through the filter material and exposes the condition of the filter. A vertical recess is formed in the wall of the conical member and a printed aluminum foil tape, received within the recess, has markings thereon for indicating the stock number of a replacement filter. The different markings correspond to varying filter inner diameters.
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