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The 16 th notes are slurred together, as are the quarter notes. As far as I can see, that is. Dont know what the accents are under the 16th notes however, not sure if its something to do with bow pressure, or bowing style, like the flat lines denote staccato, but the middle notes are slurred as normal.? mind you I am not much good at reading music anyway, Andrew H could tell you exactly how to play these.