
Piston Rings For General Engineering; R-rings, Plain Compression Rings, 30 Up To 200 Mm Nominal Diameter For Seals On Rotating Shaft
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Piston Rings For General Engineering; R-rings, Plain Compression Rings, 30 Up To 200 Mm Nominal Diameter For Seals On Rotating Shaft
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻