{HEAD ~ Various arrangements} of pinned or cantilevered cards may act as a pusher, bender or {TAIL ~ other motive actuator}, and structures such as powered bellows may be formed directly by folding one or more suitably patterned cards 
act as
{ HEAD ~ Various arrangements } of pinned or cantilevered cards may act as a pusher , bender or { TAIL ~ other motive actuator } , and structures such as powered bellows may be formed directly by folding one or more suitably patterned cards
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL OTH OTH OTH OTH OTH TAIL 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