| http://www.w3.org/ns/prov#value | - The cylindrical portion 23 has an inner wall formed with a plurality of guide ribs 23 c, which extend from a lower portion toward the flanged portion 12. [0161] The apertures 23 a formed in the cylindrical portion 23 provides a structure wherein gas or other fluid can smoothly move between the inner space of the fuel tank B and the inner space of the cylindrical portion 23, which has the float 40
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