求翻译：A seal-journal surface that features an inverted shot-peened texture, with raised (rather than indented) spherical lobes and corresponding valleys in between, better supports hydrodynamic lubrication. EPT developed a process that compresses seal journals between burnishing dies that have been peened to create random spherical depressions. This leaves an "orange peel" texture on the journal surface, typically with a 20 to 40-^in. surface roughness.是什么意思？

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