采区

In comparison on size, shape and quality of native gold between gold placer and original gold minerals, based on the study of native gold quality in the two types gold deposits and analysis on reproductive significance of gold placer mining areas, the preliminary discussion on hydrochemical mineralization factor of gold placer was made.

通过从砂金矿和原生金矿中自然金在粒度、形态、成色等方面特征对比，两类矿床中自然金成色的关系研究以及砂金过采区再生产意义的分析，对砂金水化学成矿因素进行了初步探讨。

The results show high levels of toxic metal elements in both groundwater and surface stream water in the Lanmuchang Hg-Tl mineralised area and low concentrations in groundwater away from the mineralised area.

结果表明，已开采的 Hg-Tl矿区地下水和地表水中均有很高的毒害金属元素，煤采区地下水中亦表现出类似的特征，而 Hg-Tl矿区外围地下水中金属元素保持在较低的水平。

A major industrial and coal mining region in the valley of the Ruhr river in northwestern Germany.

德国西北部一区，位于鲁尔河的峡谷中，是一个主要的工业和煤矿开采区。

In this paper,based on field investigation of Kiruna mine,Sweden,and strata control rules,block Y28 on level 632 in the mine is designed and modeled by means of the computer aided design system with strata control rules,and some of conclusions on strata control and computer aided design in stope are drawn.

根据瑞典北部Kiruna矿的现场调查，采用考虑岩层控制规律的CAD系统，对该矿632水平Y28采区进行了设计模拟，得出了如下结论：1.CAD设计中必须考虑岩层控制规律，与大规模开采有关的问题可通过考虑岩层控制规律得到改善。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。