| 摘要 |
<p>1. Method for producing plane rectangular covering grid plates of cast iron consisting of longitudinal interstices between longitudinal bars (2) which, in an angle to these, are connected with transverse bars (3), characterized by the use of a horizontally arranged open mould (10) which, by means of a filling-system, is to be filled with a, manually or automatically proportioned, melted quantity, amounting to not more than from 4 to 2 mm underneath the mould surface.</p> |
