| 摘要 |
A tool designed to operate in a substantially vertical position without contact with a workpiece such as a laser beam machining head comprising an operating member and a support for this member rigidly connected to a machine frame. This operating member comprises mounting means resting at at least three points on a support, this tool also has abutment means impeding displacement of the operating member in a plane substantially perpendicular to its axis (W, W').
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