| http://www.w3.org/ns/prov#value | - Patent US6415208 - Apparatus and method for surveying rails, in particular running rails for ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsApparatus and method for surveying rails, in particular running rails for cranes, shelf handling units, running wheel blocks, includes a transmitter unit arranged on the rail and having a laser,
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