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湖南瑶岗仙矿业有限责任公司(以下简称瑶岗仙矿业或公司)位于“有色之乡”——郴州,地处宜章、资兴、汝城三县(市)交界处。矿山始采于1914年,是我国钨业的起源地,现为中国五矿湖南有色金属控股集团下属的国有钨资源骨干企业。 相似文献
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本文就以深圳市与东莞市交界处的某大型住宅小区工程为例,就混凝土超远距离泵送施工进行初步技术探讨和经济分析。 相似文献
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对公路桥梁设计安全的探讨 总被引:1,自引:0,他引:1
美丽的泸沽湖位于四川盐源县和云南宁蒗县的交界处,方圆约40km。由于这里风光奇美,同时,也由于居住在这一带的4万多摩梭人至今还保留着一些母系社会的古老风俗习惯,所以引起人们极大的兴趣。 相似文献
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A dragonfly wing consists of membranes and both longitudinal and cross veins. We observed the microstructure cross-section
at several locations in the dragonfly wing using environmental scanning electron microscopy (ESEM). The organic nature of
the junction between the vein and the membrane was clearly identifiable. The membrane was divided into two layers, the upper
epidermis and the lower epidermis. These layers extend around the sandwich structure vein, and combine with the adjacent membrane
at a symmetrical location along the vein. Thus, we defined this as an organic junction between the vein and the membranes.
The organic junction is able to form a tight corrugation angle, which dramatically increases both the warping rigidity and
the strength of the wing, but not the torsional rigidity. The torsional deformation is primarily controlled by the microstructure
of the longitudinal veins, and is based on the relative rotation angle between the epidermal layer and the inner layer of
the vein that forms the zigzag section. 相似文献
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“地震了,地震了,快,躲起来……”瞬间,云南省永平县博南镇老街中学的全体学生全都钻到了桌子下面。老师们看到同学们如此敏捷的动作,脸上露出了欣慰的笑容。这是2007年3月28日上午10点57分41秒,云南省永平县龙门乡与云龙县交界处发生4.6级地震后。学校有强感, 相似文献
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位于河北省东北部的平泉县,地处冀、辽、蒙三省交界处。素有“鸡鸣三省”之说。东临辽宁省凌源市,西连承德县。南靠宽城县,北接内蒙古宁城县,历史上曾称作“八沟”。 相似文献