| 摘要 |
An engine exhaust purifying device is positioned at a connection between an exhaust pipe and an expanded pipe, which is located upstream of an oil reservoir and below an engine, and includes an outer pipe and an inner pipe joined together to form a dual-pipe structure, the outer pipe being weld connected at its reduced-diameter portion to a fuse connection portion of the inner pipe, the fuse connection portion carrying no ventholes and a catalyst layer thereon and the exhaust purifying device being enclosed by a heat insulating protector.
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