| http://www.w3.org/ns/prov#value | - pivot pins 60 allowing multiple sections 56, 58 of expandable articulated support frames to be selectively joined together or uncoupled from one another, for a variety of purposes, such as meeting the needs of a particular construction job, fitting the support frame into an available work space, or otherwise configuring a work piece support apparatus, according to the invention, in an advantageou
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