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   hammer 在 矿业工程 分类中 的翻译结果: 查询用时:0.145秒
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hammer
相关语句
  锤头
    Development and Application of Die Cast Hammer Made of Composite Metal
    金属型复合铸造铸态锤头的研制及应用
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    The similarity principle of hammer offset pendulum in a crusher and its application
    锤式破碎机锤头偏摆的相似性原理及应用
短句来源
    Development of the new type JN801 long-lasting hammer used in crushing mill
    JN801新型高寿命立磨锤头的研制
短句来源
    Development of High Vanadium High Wear-resistant Alloy Hammer
    高钒高耐磨合金锤头的研制
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    Modern Casting Technology of Compound Hammer
    现代复合锤头铸造技术
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  “hammer”译为未确定词的双语例句
    J-200B DOWN-THE-HOLE DRILL HAMMER
    J-200B型潜孔冲击器
短句来源
    A STUDY ON JW-150 HIGH PRESSURE DOWN-THE-HOLE DRILL HAMMER
    JW—150型高气压潜孔冲击器的研究
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    Design and Calculation of Balance Hammer in the Single Vessel Elevation System of Mine shaft
    矿井单容器提升系统平衡锤设计及校核计算
短句来源
    DEVELOPMENT OF SYG-1 HYDRAULIC HAMMER
    SYG-1型液压镐研制
短句来源
    Optimizing Design of Hydraulic Hammer
    液压冲击器的优化设计
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  hammer
Drop hammer tests were carried out to study the axial crash behavior of aluminum foam-filled hat sections.
      
The experimental modal analysis was performed on a two-story steel braced frame model excited by simulated ambient vibrations and hammer impacts.
      
Water hammer in hydraulic systems with an annular damper of plastic deformations
      
Results are presented on the theoretical and experimental study of the water-hammer process in a line with an annular plastic-deformation damper.
      
Water hammer and propagation of perturbations in elastic fluid-filled pipes
      
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China is a large country, with abundant resources and a long history. Accord- ing to legend, in Shanxi Province, mining for copper dates as far back as 5300 years ago. It has been verified by modern archaeology that in Gansu Province copper mines and lead mines were worked not later than 4000 years ago. During the Shang Dynasty (1600 B. C. -- 1100 B. C.), extensive mining was carried out for copper, tin and lead, and covered a very broad area from Inrier Mongolia in the north to the Five Mountain Ranges in the...

China is a large country, with abundant resources and a long history. Accord- ing to legend, in Shanxi Province, mining for copper dates as far back as 5300 years ago. It has been verified by modern archaeology that in Gansu Province copper mines and lead mines were worked not later than 4000 years ago. During the Shang Dynasty (1600 B. C. -- 1100 B. C.), extensive mining was carried out for copper, tin and lead, and covered a very broad area from Inrier Mongolia in the north to the Five Mountain Ranges in the south and from Gansu Province in the west to Shandong Province in the east. During the Western Zhou Dynasty government officials were appointed for the organization and management of the mining industry. In the earliest mining operations, stone implements were used. In the excavation of the Linxi Ancient Copper Mining Site in Inner Mongolia, more than 1060 pieces of buried stone hammers and other mining implements were found. Mining at this ancient site possibly began in the Western Zhou Dynasty and continued to the Tang and Song Dynasties. Thirty-eight open-pits were found there, the largest pit had a maximum length of more than 500 meters and a maximum depth of 17 meters. Large amounts of furnace slag were also found, indicating a comparatively large scale of operation. During the Eastern Zhou Dynasty (known as the Spring and Autumn and the Warring States Periods), the mining of iron ore became common. The Qi Kingdom carried out the policy of "nationalization of mountain and sea," which encouraged the development of mining and metallurgical enterprises, and the mining of various metal minerals became common. Some of these were recorded in detail in the ancient book "Shan-Hai-Jing" (the book of Mountain and Sea). This book recorded more than ten kinds of metallic mineral products, 176 old mining sites, and information about various types of ore deposits and metallic mineral association. This book is among the world's oldest literature on mining. Since 1974, an ancient underground copper mine of the Zhou Dynasty has been explored by excavation at Tonglushan, Hubei Province. This find has been of important significance in the study of the history of ancient mining and social de- velopment in China. At this ancient mine site many vertical shafts were sunk since the Western Zhou Dynasty. The depth of the shafts reached more than 50 meters during the Warring States Period. The hoisting, drainage and ventilation problems of underground mining were solved successfully. The windlass used for hoisting was much improved from those commonly used and more scientific. Through the development of many types of timber-sets, the ancient miners successfully overcame the difficulty of mining in fissured ground, thus greatly advancing the technique of underground mining and contributing to the development of mining in ancient China.

由近代考古工作证明,我国最晚大约于四千年前,就在现今的甘肃省开始开采铜矿和铅矿。商代(公元前1600~1100年)铜、锡、铝矿已大量开采;西周时设有矿官,负责矿业的组织管理。文章着重引证了内蒙林西露天古铜矿和湖北铜录山古铜矿井的出土文物资料,说明我国开采矿业历史悠久,古代劳动人民在采矿技术方面有很多发明创造,做出了很大贡献。

The short life of drill string is mainly caused by premature fracture of steel rod and the failure of tapered shank of bit due to expansion.In this paper, the determination of the longitudinal stresses of steel rods and the expansive loads acted upon the tapered shanks of bits is described. The determination is conducted in a series of drop-hammer tests in 6 different types of media, including steel anvil,hard taconite, lead block, rubber, sand and free air, under simulated working condition of a rock...

The short life of drill string is mainly caused by premature fracture of steel rod and the failure of tapered shank of bit due to expansion.In this paper, the determination of the longitudinal stresses of steel rods and the expansive loads acted upon the tapered shanks of bits is described. The determination is conducted in a series of drop-hammer tests in 6 different types of media, including steel anvil,hard taconite, lead block, rubber, sand and free air, under simulated working condition of a rock drill. For YT-25 drill, the max. longitudinal stress in drill steel amounts to 5300-6000kg/cm2. By analyzing the aforementioned measurements and computations, a theoretical basis for the selection of materials and heat-treatment procedures of drill steels and drill bits is proposed.

钎头、钎杆早期折断和胀裤是目前钎具寿命不高的主要原因。作者在模拟凿岩机工作条件的落锤试验台上,对六种介质(钢砧、坚硬铁矿、铅、橡胶、河沙以及悬空等)测定了钎头、钎杆的轴向应力和胀裤力。对于YT—25型凿岩机,钎杆中最大轴向应力可达5300~6000公斤/厘米~2。根据测定结果,本文提出了分析意见,为钎杆和针头选材和制订热处理工艺提供了依据。

Modern open pits in China appeared in the begining of the 20th century. Development of new drilling equipment began in 1958,and in the seventies they began to replace older open pit drilling equipment.At present,rotary drills are em- ployed at large open pits and down the hole hammer drills at medium and small sized open pits.The churn drill is being eliminated. Blasting technology has made rapid progress since 1956.In recent year it has be- en approaching world advanced levels in several fields:multiple-short-delay...

Modern open pits in China appeared in the begining of the 20th century. Development of new drilling equipment began in 1958,and in the seventies they began to replace older open pit drilling equipment.At present,rotary drills are em- ployed at large open pits and down the hole hammer drills at medium and small sized open pits.The churn drill is being eliminated. Blasting technology has made rapid progress since 1956.In recent year it has be- en approaching world advanced levels in several fields:multiple-short-delay blasting, new explosives and large scale chamber blast etc. The principal loading equipment at chinese open pits is the 4m~3 electric shovel. The output of advanced shovels exceeds 1.0 million(tons/m~3.year).Now larger shovels with 10~15m~3 bucket capacity,bucket wheel excavators and front-end-loader with 5m~3 capacity are manufactured. Rail transport is popular in chinese open pits and much experience has been gai- ned.Truck haulage is widely employed and the use of trucks made in China is incr- easing.Great interest is shown in the use of ore passes and belt conveyor haulage. Significant achievements have been obtained in many of fields of open pit opra- tion,for example,open pit design theory,technical measures to raise overall production capacity,computer applications,mine system engineering and open pit slope stability etc.

中国近代的露天矿出现于二十世纪初。从1958年研究新型穿孔设备,到七十年代才开始更新露天矿的穿孔设备。现在,大型露天矿山主要使用牙轮钻机,中小型露天矿山主要使用潜孔钻机。钢绳冲击钻机正在被淘汰。1956年以后,露天矿爆破技术得到迅速改进。最近几年来,在微差爆破、新型炸药和硐室大爆破技术等方面,已经接近了国外先进水平。露天矿的装载设备以4米~3电铲为主。先进电铲的生产能力已经超过100(万吨/米~3·年)。近几年来,业已制成10~15米~3铲斗的大电铲,斗轮挖掘机和5米~3前端式装载机。在露天矿里,铁路运输应用较多,并积累了丰富的经验。汽车运输也得到广泛应用,并且愈来愈多地使用国产自卸汽车。溜井运输和胶带运输机运输受到极大重视。在露天矿设计理论、提高露天矿综合生产能力的措施、计算机在露天矿应用、矿山系统工程、边坡稳定等方面,也做了很多工作,取得了有意义的进展。

 
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