| 摘要 |
Rock working tool for a tunnel boring machine. The tool comprises a shaft (34) with a central hole (35). A tool part (8,9) is rotatably journalled on the shaft. The tool is cooled through the arrangement of channels (40,41,42) in the tool for conducting cooling liquid from a pressure liquid source (22) to the central hole and via the channel (42) which flushes directly on the tool part (8,9). |
