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When constructing senior highways in China, the project of multi-arch tunnel is often adopted in special geologic and limited topography districts in order to meet the need of road type and outspreading road, to get better technological and economical purpose.

我国在高等级公路的建设中,在特殊地质及地形条件受限的地区,为了高速公路线型及展线的需要,同时为了获得良好的技术经济效果,常常选择连拱结构的隧道方案。

The progress of TEDS in China.(3) The theoretical basis of TEDS....

文中还提出了以C+V+M=最小,作为评价经济效果的准则。

The paper describes bauxite positive flotation desilication process and the agglomeration mechanism of sulphuric acid and aluminum sulphate.

介绍了铝土矿正浮选脱硅生产工艺流程,阐述了硫酸和硫酸铝的团聚机理,通过工业对比试验,证明了在精矿脱水工艺中应用硫酸比硫酸铝具有更优越的技术经济效果

By pilot tests,the sulphuric acid shows more techno-economic results than aluminum sulphate aluminum in the dewatering process of concentrate.

介绍了铝土矿正浮选脱硅生产工艺流程,阐述了硫酸和硫酸铝的团聚机理,通过工业对比试验,证明了在精矿脱水工艺中应用硫酸比硫酸铝具有更优越的技术经济效果

The roof was supported in the adjacent upper floor, which solved the anchor problem and provided sufficient space for renovation construction.

由于支顶在改造施工的上面一层进行,不但解决了支撑点的问题,而且为改造施工提供了较大的空间,取得了较好的技术经济效果

It is proposed that economical performance of diamond bits be quan-titatively appraised by use of bit drilling cost .

并提出用钻头钻进成本定量地评价金刚石钻头的经济效果

This paper researches on 4100QB Cylinder-block of the KW moulding line, particularly introduces the forming mechanism of blowholes on 4100QB Cylinder-block. This paper also analyzed the producing reason of blowholes from ...

本论文还从造型砂处理、制芯、熔炼、模具等方面全面分析了侵入性气孔产生的原因,并制定了相关的改进措施,使4100QB机体气孔废品率从1.5%下降到了0.5%左右,从而获得了满意的经济效果

It synthesizes author's experiment conclusion for roller compacted concrete mix- ing high volume of fly ash, fine slag powder and silica fume respectively.

掺合料技术是当代混凝土新技术之一,其在道路碾压混凝土中的应用获得了很好的技术、经济效果

The technological improvement on the heating furnace's problem is put in practice.

分析了安钢250机组加热炉的运行状况,针对运行中存在的加热能力不足,炉温不均匀等问题进行了综合技术改进,取得了良好的经济效果

In the article we do some analysis, count and contrast on the change of period-mode heat treatment electric stove's accumulation of heat capacity and stove weight and the furnace lining's structure of it has been improved on.

通过对周期式热处理电炉在炉衬结构改进前后的蓄热量和炉体重量的分析计算对比,证明了耐火纤维在周期式热处理电炉上的应用,将会给热处理电炉带来显著的节能经济效果

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。