| 摘要 |
The invention pertains to a machine for producing or widening ground bores and/or for shattering old pipelines and laying new pipelines, consisting of a push-pull unit and a rod assembly that is connected to and driven by the push-pull unit and extends through the ground bore or the pipeline, with projections and/or recesses being arranged on the rod assembly, and with positive coupling means that engage on the projections or in the recesses arranged on the push-pull unit.
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