A first board having 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 {HEAD ~ a grid} positioned between {TAIL ~ the boards} 
positioned between
A first board having 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 { HEAD ~ a grid } positioned between { TAIL ~ the boards }
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