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Androgynous Peripheral Attach System
The terms Androgynous Peripheral Attach System (APAS), Androgynous Peripheral Assembly System (APAS) and Androgynous Peripheral Docking System (APDS), are used interchangeably to describe a family of spacecraft docking mechanisms, and are also sometimes used as a generic name for any docking system in that family. A system similar to APAS-89/95 is used by the Chinese Shenzhou spacecraft.
==Overview==
The name of the system is Russian in origin, and is an acronym, АПАС, in the Cyrillic alphabet, from the Russian, ''Андрогинно-периферийный агрегат стыковки''. The English acronym was designed to be just the same letters but in the Latin alphabet, for which the first two words are direct counterparts of those in the original. But the third word in Russian comes from the German ''aggregat'', meaning "complicated mechanism", and the last means "docking". The last two words in the English name were picked to begin with the same equivalent letters as in the Russian name.
The idea behind the design is that unlike with the probe-and-drogue docking system, any APAS docking ring can mate with any other APAS docking ring; both sides are ''androgynous''. In each docking there is an active and a passive side, but both sides can fulfill either role. There are three basic variations of the APAS system.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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