Upon entering this groove, the pushed anti slip off ring is released from its expanded condition, decreasing in diameter so that it comes in {HEAD ~ contact} with the inner circumferential surface of the pin insertion hole of the link and with {TAIL ~ the inclined groove surface} of the pin and, consequently, it is securely installed 
with
Upon entering this groove , the pushed anti slip off ring is released from its expanded condition , decreasing in diameter so that it comes in { HEAD ~ contact } with the inner circumferential surface of the pin insertion hole of the link and with { TAIL ~ the inclined groove surface } of the pin and , consequently , it is securely installed
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