{HEAD ~ A first board} having {TAIL ~ a plurality} of openings formed therethrough and a second parallel board having a plurality of complementary contact elements extending into the openings are interconnected by a heat recoverable metal motion transmitting means preferably in the form of a grid positioned between the boards 
having
{ HEAD ~ A first board } having { TAIL ~ a plurality } of openings formed therethrough and a second parallel board having a plurality of complementary contact elements extending into the openings are interconnected by a heat recoverable metal motion transmitting means preferably in the form of a grid positioned between the boards
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH