placer中文什么意思

n.
1.安置者，调配者。
2.第…名。
短语和例子
+更多解释...the sixth placer in a competition 比赛中的第六名。n.
【矿物】(含金、铂等的)砂矿，砂积矿床(opp. lode)。

• air placer:    混凝土气力压送机
• alluvial placer:    冲积矿床; 冲积砂矿床
• bar placer:    钢筋工

例句与用法

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1. The objection to the placer origin have centred around the softness of uranium compounds .
   反对砂矿成因的论据主要是：铀的化合物不耐磨蚀。
2. Gold and other heavy mineral placers are notable examples of lag deposits, but gravel and boulder bars are more common .
   金和其它重矿沙虽是蚀余沉积物中值得注意的例子，然而卵石和顽石沙洲都是比较普遍的。
3. Figure 16-20 shows the good correlation observed between the magnetic field and the gold values over a muck-covered placer in this area .
   图16-20表明了此地区腐殖土覆盖下砂积矿床上面的磁场和含金量之间的良好对比关系。
4. Dredging technology and equipment for thailand placer
   泰国砂矿的船采工艺及设备
5. Study on hydrochemical mineralization factor of gold placer
   砂金水化学成矿因素探讨

英文释义

名词

1. an alluvial deposit that contains particles of some valuable mineral