| http://www.w3.org/ns/prov#value | - As noted, the specimen holder 50 comprises a flat tubular member 90 formed of a hard, transparent material, such as glass or plastic, with a pair of adjacently spaced wide parallel sides 92 and 94 and remotely spaced short, curved connecting sides 96 and 98, cooperately defining therebetween a specimen holding channel 100.
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