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It introduces a method to produce the casting pattern of fire control bolt cover with LOM.

采用LOM即叠层实体制造或分层实体快速原型制造工艺制造消防栓盖的样件。

Therefore, low-pressure casting is one of the best ways in manufacturing aluminum alloy wheels.

所以低压铸造是制造铝合金车轮最好的方法之一。

A series of measurements including macrograph , inclusion, segregation and property of rolled steel products confirm that the contionus casting process gives satisfaction to the quality of the products.

内容包括：铸坯的低倍组织，非金属夹杂物、成分偏析及钢材性能。

A series of measurements including macrograph , inclusion,segregation of composition and billet surface and property of final rolled steel products confirm that the continous casting process gives satisfaction to the quality of the products.

介绍了我国第一台特殊钢方坯连铸机，连铸含Ti奥氏体不锈钢的铸坯质量情况，内容包括：铸坯的低倍组织结构、非金属夹杂物、化学成分偏析、铸坯表面及钢材性能。

The variations of process parameters have great impact on the surface quality and macrostructure of casting billets.

针对液态下化学性质相对活泼的钛合金，采用冷坩埚技术对其电磁约束铸造工艺过程进行了实验研究，考察了工艺条件对成形坯件表面质量和内部组织的影响。

Much of the Celtic magic calls for the assistance of their Good Neighbours, with those who were familiar often using the little folks' fairy circles of mushrooms found in fields, rather than casting their own magic circle.

大部分的凯尔特魔术呼吁为协助他们的好邻居，与那些谁熟悉经常使用的小乡亲'童话各界的蘑菇中发现的领域，而非铸造自己的魔术圈。

At present, most of the magnesium alloys are produced by the way of casting.

金属镁及其合金是工程应用中的超轻型的结构材料之一。

The GYG-1-240 energy conservation power frequency has the core smelting furnace, mainly uses in smelting the carbon steel, metals and so on alloy steel, high-manganese steel, ferroalloy, cast alloy iron, gray iron, copper, copper alloy smelts, because the furnace temperature is higher than 1600℃, and has six grade of temperature controls, suitably in 1250-1600℃ the different melting point metal's smelting, and may fall the files heat preservation to wait for the casting or the adjustment melt fluid ingredient, the electromagnetism magnetic field magnetic line of force automatic agitation causes the ingredient to be even, non-element loss by burning.

GYG-1-240节能型工频有芯熔炼炉，主要用于熔炼碳素钢，合金钢、高锰钢、铁合金、合金铸铁、灰铸铁、铜、铜合金等金属熔炼，由于炉温高于1600℃，并有六档温度调节，可适用于1250-1600℃不同熔点金属的熔炼，并可降档保温等候浇铸或调整熔液成份，电磁磁场磁力线自动搅拌使成份均匀，无元素烧损。

The GYG-1-240 energy conservation power frequency has the core smelting furnace, mainly uses in smelting the carbon steel, metals and so on alloy steel, high-manganese steel, ferroalloy, cast alloy iron, gray iron, copper, copper alloy smelts, because the furnace temperature is higher than 1600℃, andhas six grade of temperature controls, suitably in 1250-1600℃ the different melting point metal's smelting, and may fall the files heat preservation to wait for the casting or the adjustment melt fluid ingredient, the electromagnetism magnetic field magnetic line of force automatic agitation causes theingredient to be even, non-element loss by burning.

GYG-1-240节能型工频有芯熔炼炉，主要用于熔炼碳素钢，合金钢、高锰钢、铁合金、合金铸铁、灰铸铁、铜、铜合金等金属熔炼，由于炉温高于1600℃，并有六档温度调节，可适用于1250-1600℃不同熔点金属的熔炼，并可降档保温等候浇铸或调整熔液成份，电磁磁场磁力线自动搅拌使成份均匀，无元素烧损。

ABSTRACT In this thesis, the microstructure, the in situ tensile fracture processes and the mechanism of deformation and fracture of the SiC whisker reinforced aluminium composites made by a squeeze casting method were studied by means of SEM, TEM, HVEM, AES, HREM, electronic tensile machine and magnetic tape recorder. The dislocation theory and the complex function method were also used during analysis.

本文利用扫描电镜、透射电镜、高压电镜、俄歇谱仪、高分辨电镜、电子拉伸机和磁带式记录仪等设备和技术以及位错理论和复变函数方法研究了由高压凝固铸造法制备的碳化硅晶须增强铝复合材料的显微组织、动态拉伸断裂过程以及在特殊条件下变形和断裂的规律。

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