| 摘要 |
<p>Boards, plates, and the like for use in buildings are made by mixing with dry wood wool, just sufficient thinly-liquid plaster to coat the fibres. According to an example, 7 kg. plaster is mixed with 7 litres of water and stirred with 3,5-4 kg. wood wool. The mixture is moulded; reinforcements may be inserted in the moulds.</p> |
