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				Below is the picture of the blade. Let's discuss...   
This is the 1st time I saw this type of greneng-works. 
What does these represents?
			
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 If you're not too strict, the first greneng (downwards from the tip of the blade) might represent a bird's head (most likely an eagle?); of course, this is just one of several possible interpretations.
The rest (or possibly all) of the greneng looks like foliage-like decoration to me.
Regards,
Kai