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      . 13.1.

 13.1.    ,   
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-                             
EREW        Exclusive Read Exclusive Write (    )
CREW        Concurrent Read Exclusive Write (    )
ERCW        Exclusive Read Concurrent Write (    )

CRCW       Concurrent Read Concurrent Write (   
)

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 (. . 13.1)   .    (CRCW) 
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