I guess Blade here is a knife? or a knife blade?
Can it be that "edge" and "blade" both has the same meaning?
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'Edge' refers to the edge of a [knife] blade, and 'blade' refers to a tool with a blade of some kind - probably a knife. In effect, they are the same thing but the former is referring only to the blade as you cannot really substitute 'edge' for 'knife'.
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'Edge' refers to the edge of a [knife] blade, and 'blade' refers to a tool with a blade of some kind - probably a knife. In effect, they are the same thing but the former is referring only to the blade as you cannot really substitute 'edge' for 'knife'.