| http://www.w3.org/ns/prov#value | - Such devices as described above may be used in multi-ple modifications for many varied purposes, for example clamping frames, (vises, lathe chucks) holding devices (limb and head clamps; foot clamps for surgical and similar instruments), for supporting devices and supports (lunette bearings, supports, chair seats and backs, operating chairs and invalid chairs), for matrices, selfadjusting formers,
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