SANS 1275-2006 Double-pitch precision roller chains and sprockets for transmission and conveyors《传动和传送带用双节距精密滚子链和链轮》.pdf

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GB T 5269-2008 传动与输送用双节距精密滚子链、附件和链轮.pdf

GB T 5269-1999 传动及输送用双节距精密滚子链和链轮.pdf

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