wtd chainrings and bolts

Whats WHY stand for?!

I've seen it loads of times when cars etc are being sold but don't know what it stands for!!
 
I have a load of chainrings (no bolts tho...)

I'll have a look.

I know that I do have a gold compact Sugino with hardly any wear. That would be idea. Think its a 34 tooth.
 
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