| 摘要 |
<p>The method involves using a mold with a mold core (14) enclosed by a mold casing (12), on which a mold body (32) forming at least one channel of the lower part is arranged, filed with a concrete mixture and the lower shaft part thus produced is removed from the mold after at least partial setting. A reusable plastic mold body is arranged on the mold core and gaps between the mold body and the mold core and/or the mold casing and core and/or the casing and/or sections of the mold body are covered and/or filled with removable setting material.</p> |
