| 摘要 |
<p>The earth borer has an extended bearer (10) with a runway (11) to guide a main carriage (25). The drive device for the main carriage (25) consists of a piston-cylinder unit (27) extending beneath the runway (11) under the main carriage (25), the cylinder (28) of which is supported on the bearer (10) via a joint (29). The piston rod (30) engages with the front end of the main carriage (25). The piston-cylinder unit (27) projects beyond the rear end of the bearer only slightly or not at all.</p> |
