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#earthwork #mound #embankment #dyke #landform

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#hillock #natural mound #earthwork #small hill #grassy mound

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#trench #earthwork

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#trench #military trench #parapet #earthwork

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#digging #entrenching tool #trench #hole #earthwork #infantry

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#field ditch #irrigation ditch #trench #earthwork #land drain