The researches on space materials vacuum effect in China are described. The effects of cold weld for space materials and moblie parts and the effects of molecule pollution on the long life and the reliability of spacecraft are indicated.

Process and equipment needed including aluminium ( alumnus alloy) continuous casting and rolling, aluminium continuous extrusion, continuous wire drawing, cold press weld and wire stranding;

对工艺技术与装备：铝（铝合金）连铸连轧、铝连续挤压、连续拉线、冷压焊和绞线；

Practical Analyzation on Working on the Drum of Flat Rotary Curing Press with a Method of Complete Cold Winding Weld

用整体冷卷焊接法加工平带鼓式硫化机鼓体的实用分析

Numerical simulation of molten pool temperature field for TIG welding of pure copper without preheating

不预热情况下的紫铜TIG焊熔池温度场的数值模拟

Numerical simulation on temperature field of TIG welding for red copper without preheating

不预热紫铜钨极氩弧焊温度场的数值模拟

The segregation sex of the special zone makes the special zone maintains opposite independence, facilitating management.

特区的隔离性使特区保持相对独立, 便于管理.

Any civilian-run technology enterprise shall abide by laws, regulations and rules of the Special Zone.

民办科技企业应当遵守法律 、 法规和特区规章.

A trade council of export trade in special zone should have no more than 27 directors.

一特定地区输出业同业公会之理事不得超过二十七人.

The coastal special zone enters and is stationed in joint capital enterprise, connection enterprise several.

沿海特区进驻的合资企业, 关联企业数家.拥有先进高中端印前、印刷及包装设备数台套.

Examines the false function: Has the fluorescence, magnetism, synthesis examination function and so on numerical code.

检伪功能: 具有荧光, 磁性, 数码等综合检测功能.

Company address: Youth road Venice numerical code square.

公司地址: 青年路威尼斯数码广场.

By the LED numerical code tube demonstrated the decoder outputs signal.

由LED数码管来显示译码器所输出的信号.

List each province and territoy and tell when each one joined Confederation?

列举每个省份及特区,并说出何时加入同盟?

Beijing is about twelve hours ahead of Washington D . C .

北京比华盛顿 特区 早了12小时左右.

Participants included 91 Washington area families with children age 10 on average.

参加这项调查的是华盛顿特区中小孩平均年龄为10岁的91个家庭.

Today, I have three mice in my laboratory to experiment on.

今天, 特区的三个人都是我战21的白老鼠.

DC means direct current.

DC就是直流电.

Coil voltage 24 V DC.

线圈电压24伏直流电.

These furnaces may operate on AC or DC.

电炉可以采用交流电或直流电.

The units are available for either alternating or direct current.

这些装置既可以用交流电,或可以用直流电.

A current is a current flowing always in the same direction.

直流电是一种总是沿同一标的目的流动的电流.