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Bluing, sometimes spelled as blueing, is a passivation process in which steel is partially protected against rust using a black oxide coating. It is named...

Cabinet (or CAB) is an archive-file format for Microsoft Windows that supports lossless data compression and embedded digital certificates used for maintaining...

The ZF41 was an optical sight produced in Germany during the Second World War. Starting from 1941, the short 1.5× Zielfernrohr 41 (ZF41) telescopic sight...