When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a

When the elements of a pair are kept in contact by the action of exter

1.	When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a
A.	lower pair
B.	higher pair
C.	self-closed pair
D.	force-closed pair
Answer» E.

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When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a

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