| 摘要 |
Adjustment device for the crawler link extn., used for the withdrawal of extruded plastic tubes by three or four crawler tracks, has the rockers for the two lower crawlers joined through a linkage to a cross member which can be tilted around a feedscrew nut. The feedscrew is supported in a swivelling fork and can be shifted in a guide. Two intermediate pieces in the linkage to the cross member are adjustable horizontally and vertically by an upper and lower rope drive in connection with the feedscrew.
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