| 摘要 |
A classification gauge and method of operation for accurately and repeatably measuring the open flow area of a pair of air foil or vane elements interconnected by end buttresses, the classification gauge including first and second sets of probes arranged for contact with the vanes adjacent the open flow area and first and second lateral probes for engaging the end buttresses, an indicator of open flow area being effectively interconnected with the two sets of probes and the two lateral probes by means of a proportional mechanism.
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