| 摘要 |
PROBLEM TO BE SOLVED: To provide hydraulic equipment provided with a positive sealing function by pressing a gasket part with sufficient pressing force without using a large-scale flattening device such as a large-sized press. SOLUTION: A linear projecting part are formed surrounding the periphery of a bore or a port formed in a body made of aluminum. The surface of the linear projecting parts is flattened by applying pressure, and a gasket is interposed between the surface of the flattened linear projecting parts and the other member such as a cover.
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