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.
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In which a long history of placer gold mining.
其中砂金开采历史悠久.
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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.
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Dredging is the most important placer - mining method today.
挖掘法现在是最重要的砂矿开采的方法.
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The operation practice indicated that the remining of placer gold in Laozuoshan Gold Mine was efficacious.
生产实践表明,采金船复采在老柞山金矿的应用是行之有效的.
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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.
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This primitive form of placer mining is still used in some places for panning gold.
这种原始的砂矿开采形式至今还在一些地方用来淘金.
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The method of gold placer mineral includes significant prospecting information in the prospecting assessments gold deposits.
在金矿找矿和评价工作中,重砂测量方法能提供重要找矿信息.
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The fineness of placer gold in this district is apparently featured by inhomogeneity, inheritance and afterdeformation.
该区砂金成色具有明显的不均一性 、 继承性和后期改造性.
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Liaoning Xiuyan Nephrite Placer Deposit ( XNPD ) is a secondary deposit of primary nephrite ore.
辽宁岫岩软玉砂矿 ( 又称河磨玉矿 ) 是原生软玉矿的次生砂矿床.
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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.
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Eraluating the mined area is one of effective and dependable ways for exploring placer gold.
指出以过采区为依据寻找砂金矿可靠性大,风险度小,是行之有效的途径之一.
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In this thesis, placer based on optimizing the power consumption of clock gating network is presented.
本论文研制之电路摆置器, 乃基于将用于低功耗设计下之闸控制时脉网路之功率消耗最佳化.
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Pinggui Sn placer in Guangxi was discovered and exploited as early as the Bronze Age.
“平桂”砂锡矿,早在“青铜时代”已被发现、开发利用.
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