| http://www.w3.org/ns/prov#value | - lected body region may be the right or left forearm, and the positioning member is a hand grip and/or an elbow rest. [0016] The housing may include a rest whose upper surface defines the contact surface to be applied to the one selected body region, and a cover member pivotally fixed to one longitudinal edge of the rest, thereby permitting the one selected body region to be sandwiched between the
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