placer

1. The objection to the placer origin have centred around the softness of uranium compounds. PREPARATION OF Li, Na, K, Rb, Cs SALTS OF URANYL TRIACETATES AW DETERMINATION OF THEIR PHYSICAL-CHEMICAL PROPERTIES
   反对砂矿成因的论据主要是：铀的化合物不耐磨蚀。三醋酸铀酰锂、钠、钾、铷和铯的合成及物理化学性质的研究
2. Prospecting division of heavy placer minerals in surface sediments of the southern Nansha Trough and adjacent sea area
   南沙海槽南部表层重砂矿物及其成矿远景
3. Platinum is found usually as alloys of80-90% purity in placer deposits or more rarely combined with arsenic or sulfur.
   通常铂在砂矿中以合金形式存在，其中包含80～90%的纯铂，或者不多见的是与砷或硫结合在一起。
4. The Underwater Placer Resources and Its Rational Exploitation in the Estuary of Yangtze River
   长江口水域砂矿资源及其合理开发利用
5. 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。
6. The native minerals originating from Tertiary basanite of Yaoshan formation, the placer is in water systems around Fangshan.
   原生矿产于第三纪的尧山组玄武质碧玄岩中，砂矿则分布于方山周围的水系中。
7. One material source of diamond is primary diamond mines and ancient placer in the ancient Yi River upstream in Shandong, the other is the primary diamond mine which may exist in this area.
   金刚石的物质来源一是古沂河上游山东的金刚石原生矿和古砂矿，二是本区的可能存在的金刚石原生矿。
8. Mining sand and gravel or placer gold in river channel or navigation channel without approval or not in accordance with the approved scope and operation procedures.
   （三）未经批准或者不按照批准的范围和作业方式，在河道、航道内开采砂石、砂金的；
9. Based on the multi-body dynamics and Lagrange equation, the differential equation of rigid motion of the four-bar placer jib of a concrete pump truck is deduced.
   基于多体动力学理论和拉格朗日方程建立了四节臂混凝土泵车臂架的刚性运动微分方程。
10. The method using the airlift and the self excited oscillation jet for exploiting deep beach placer has been presented.
    提出了一种用气举和自激振荡脉冲射流相结合的方式开采潜水层滨海砂矿的新方法。
11. Research on mineralization environment and model of LITTORAL PLACER GOLD along Yellow Sea coast in Liaodong Peninsula
    上海是东方的黄金海岸。辽东半岛黄海沿岸滨海砂金成矿环境及成矿模式探讨
12. Comprehensive Recovery of Lead-Zinc-Sulfur from A Guizhou Concentrator's Lead-Zinc Tailings Study on synthetical recovery of tailing from the cleaning mill of placer gold at Yang-Ping-Guan
    贵州某铅锌尾矿中铅锌硫的综合回收阳平关砂金矿精选厂尾矿综合回收的研究
13. Mechanized placer mining, with special devices for washing and separating waste from valuable minerals, is used in productive alluvial deposits.
    机械化砂矿开采用于含矿量丰富的砂矿床.利用专门设备来淘洗、分离废物与有用矿物。
14. Placer mining is based on the fact that heavier substances can be separated from lighter ones in water.
    较重的物质可在水中与较轻的物质分离，砂矿开采正是利用这个原理。
15. The Government is proposing to placer on a new range of taxes to pay for social services.
    政府正考虑增加一种新的税收来服务于社会。
16. The multi-body dynamics is therefore proved useful to express the movement equation of the placer jib of concrete pump truck with each and all dynamic behavior expressed exactly.
    证明了采用多体动力学方法建立的混凝土泵车臂架的运动方程，可以准确地描述泵车的各项动力学特性。
17. Install a fold placer with modified crimping.
    安装带有改进压紧功能的折叠放置装置。
18. The Development and Elemental Clinical Application of Intrauterine Device Placer
    宫内节育器放置器的研制及其初步临床应用
19. Excavation of Qin People Tombs at the Sanmenxia Municipal Judicial Bureau and Corundum Placer Plant
    三门峡市司法局、刚玉砂厂秦人墓发掘简报
20. The particles and flakes ( and sometimes small nuggets) of gold obtained in placer mining. Dredging for alluvial gold.
    开采冲积矿获得的颗粒状和薄片状（有时呈小块状）的黄金。
21. Preliminary research in littoral placer gold in Eastern Laizhou Bay of Shandong Peninsula
    山东半岛莱州湾东部滨海砂金矿初步研究
22. Placer mining: Oldest method of recovering gold from alluvial deposits.
    砂矿开采：从冲积层回收黄金的最古老方法。
23. Study on synthetical recovery of tailing from the cleaning mill of placer gold at Yang-Ping-Guan
    阳平关砂金矿精选厂尾矿综合回收的研究
24. Mining valuable minerals from a placer by washing or dredging.
    通过从冲积矿洗涤或挖泥来提取贵重矿物的开矿。
25. The associated minerals are the important indicator of the genesis and enrichment of placer gold.
    伴生矿物是砂金成因和富集规律的重要指示标志。
26. The shapes and sizes of 19 placer gold and 3 rock gold samples in Heilongjiang have been studied.
    对黑龙江省79个砂金及3个岩金样品进行了粒度及形态研究。
27. Gold ores mined in ancient times were divided into placer gold and hill gold.
    古代采金分砂金和山金。
28. The chemical compositions of 84 placer gold samples and 7 rock gold samples in Hei longjiang province were studied.
    对黑龙江省84个砂金、7个岩金样品的化学成分进行了研究。
29. A new technic of purifying gold, silver from placer gold without pollution was proposed.
    提出了一种无污染从砂金中提纯金、银新工艺。
30. In this paper, the placer deposit drilling technique and technology used in USSR are discussed.
    本文介绍了苏联勘探砂矿矿床使用的代表性的钻探设备和钻探工艺。

noun

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