| 摘要 |
An improved mechanism such as an engine, pump, compressor, or the like, including two abutting housing members sealingly engaging each other and defining a chamber receiving a piston. The members are clamped together and at least one of the members is relieved over a portion of its area of abutment with the other, the relieved portion being remote from the chamber. Upon clamping, excellent contact stress at the boundary of the chamber is established to preclude gas leakage in spite of yielding or fretting of the parts during operation.
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