| 摘要 |
<p>A mould liner is arranged on the base of the mould and covered with a layer of comparatively wet, fine concrete. The mould is shaken and filled with normal concrete, which is compressed. The mould liner is supported over its whole surface during and after stripping of the mould and the stone with the supported mould liner is removed vertically. Specifically the mould liner is of plastic and glass fibres.</p> |
