| http://www.w3.org/ns/prov#value | - The invention according to Claim 25 is the engine of any one of Claims 1 to 18, wherein said transmission case is generally of a tightly sealed constitution and said V-belt is a resin-made belt formed by connecting together a plural number of blocks, with part of each block in contact with said drive pulley and said driven pulley being made of a resin member.
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