placer 的定义
Mining.
- a surficial mineral deposit formed by the concentration of small particles of heavy minerals, as gold, rutile, or platinum, in gravel or small sands.
- the site of a form of mining in which a placer deposit is washed to separate the gold or other valuable minerals.
placer 近义词
等同于 second
等同于 second
更多placer例句
- Really I had the money, but I just had to spend it in buying the cabin and land that was the only entrance to the placer bed.
- Since 1899 placer mining has increased considerably, although the greater part of the return has been from lode mining.
- Mining claims are of two classes: lode or quartz claims, and placer claims.
- Still lower down we came, on the following day, to a third placer, situated where the valley contracts to a trough.
- Elles tendent placer nos troupes dans un dispositif leur permettant de prendre l'offensive dans un dlai assez rapproch.