| 摘要 |
The road is gritted with iron ore pellets (6a) which are later collected with magnets (4). - The road is gritted with sand comprising iron ore pellets (6a) which are preferably heated and then distributed densely over the road. Later, magnets (4) passed over the road surface to collect the gravel, sand and dust from the pellets, which are stored for use the following winter or cold weather spell. |
