(# wait (' 
            WS_SERVER/IMAGES
        ) 
        MTX_READ
        (@ +-
            ú
            ú
            ú

            (# wait (' 
                        WS_SERVER/IMAGES
                    ) 
                    MTX_WRITE
                    (@ +-
                        ú
                        ú
                        ú

                        (# wait (' 
                                    WS_WEB_CACHE/IMAGES
                                ) 
                                MTX_WRITE
                        )
                    )
            )
        )
)
