| 摘要 |
An internal combustion engine has two side-by-side cylinders associated with a common metallic block, the engine including: (a) first and second heads separately connected to, and detachable from the respective cylinders, (b) and rocker arm assemblies including shafts carried by said heads to pivotally support valve controlling rocker arms, (c) each head may include two separate sections which are removably interconnected, one section removably connected to a cylinder and defining valve seats, and the other section carrying said rocker arm shaft. One section may include both head and rocker arm assemblies.
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