| 摘要 |
The crusher or wringer consists of rollers which are guided by rails which are fixed a short distance from the part to be demolished. The rails have teeth with wheels on the rollers engage. The rollers can be oval or can be mounted eccentrically. The rails have a constant fixed distance from the wall or floor which is to be demolished. The oval or eccentric rollers therefore exert a variable pressure on the structure to be demolished.
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