Nitrogen Protection's Effect on Solder Joint Appearance in Lead-free Reflow Soldering;
氮气保护对无铅再流焊焊点外观质量的影响
Nitrogen protection can improves wettability of lead-free solder and solder joint quality.
无铅钎料差的润湿性给传统电子组装工艺带来了巨大的挑战,氮气保护有利于改善无铅钎料的润湿性,提高焊点质量。
Based on this, a combination nozzle with high pressure water-atomizing and low pressure nitrogen protection functions is designed to manufacture spherical or quasi-spherical stainless steel powders.
从国内外研究水雾化制粉的现状入手 ,在综合国内外研究资料的基础上 ,为实现高压水雾化制取不锈钢球形或类球形粉末 ,设计了一种高压水雾化、低压氮气保护的组合雾化喷嘴。
A self-made vacuum melting and argon shield continuous unidirectional solidification equipment was used to produce copper tube with continuous columnar structure.
采用自行研制的真空熔炼、氩气保护连续定向凝固设备制备出具有连续柱状晶组织的铜管铸坯,分析了铜管铸坯生产中熔体温度、连铸速度、冷却水量,结晶器等对其的影响。
Continuous unidirectional solidification equipment under conditions of vacuum melting and argon shield is designed and made on the basis of original traditional continuous unidirectional solidification equipment and vacuum system.
真空熔化氩气保护连续定向凝固设备,是在原有的常规连续定向凝固设备的基础上,加上真空系统而设计制造出来的。
On electric protection and grounding problem of intelligent building
智能楼宇电气保护与接地问题探讨
According to the present situation of coal mine electric protection,how to detect various physical phenomenon of electric and realize complete options of coal mine electric is probed.
分析了煤矿电气保护现状,探讨了如何通过检测不同的电气物理量,来实现煤矿电气保护的完全选择性,保证安全用电和连续生产。
There are many hidden perils of the accidents using electrical equipments underground coal mine well,in which electric protection cannot give full scope to be the serious.
安全对于煤矿生产至关重要,煤矿井下电气设备的使用存在很多安全隐患,其中最为严重的是电气设备的保护功能不能发挥作用,分析了电气保护不完善的原因,提出了解决的措施。
Economic effect analysis of climate protection policy based on increasing carbon sink.;
增汇型气候保护的经济影响模拟分析
This paper supplements the literature about the effects of reducing carbon dioxide emission in an attempt to simulate the international GDP spillovers as a result of climate protection policy.
基于气候保护模型(State-contingent模型与Demeter模型)和GDP溢出模型(Mundell-Fleming模型),对中美两国在实施控制性气候保护措施之后所导致的GDP溢出影响的变化进行了模拟分析。
Two macro model systems were adopted,which are the decision support system of climate protection in China and the Computable General Equilibrium(CGE) model of Chinese economy.
系统地给出了中国实施增汇型CO2减排政策对宏观经济影响的模拟结果,所采用的模拟系统包括基于Pizer,Demeter,Zwaan工作发展的中国气候保护决策支持系统和中国经济可计算一般均衡(CGE)系统。
The effect of shielding gas type on laser weldability of galvanized steel;
保护气体种类对镀锌板激光焊接性的影响
Nitrogen protection: Apply nitrogen to detect the oxygen amount contained in the machine online ensuring the safe operation.
氮气保护系统：采用氮气保护以保证机器在安全的环境下运行。
The application of nitrogen prevention method in the production of aluminium powder;
氮气保护法在微细铝粉生产中的应用
Design and Implementation of Automatic Control System Nitrogen-protected Push Type Kiln;
氮气保护推板炉自控系统的设计与实现
Design and Analysis of Sour Water Tank With Nitrogen Protection for Preventing Self- ignition of Iron Sulfite
酸性水罐氮气保护防止硫化亚铁自燃事故的设计分析
Argument on mixture of hydrogen and nitrogen to replace hydrogen as prote ctive gas;
用氢氮混合气替代氢气保护气体的论证
gas (proof) curtain
气帘，气幕(保护)
A protective gas generation system is adopted with dissociation of liquid ammonia to get hydrogen and air separation to get nitrogen.
采用保护气体生产系统,用液氨分解制氢,用空分系统制氮。
APPLICATION RESEARCH OF FIELDBUS TECHNOLOGY IN PULSE NITROGENOUS CONVEYING CONTROL SYSTEM;
现场总线技术在氮保护脉冲气力输送控制系统中的应用研究
Smelting of high nitrogen martensitic stainless steels by vacuum induction furnace under near normal protective atmosphere
真空感应炉近常压气氛保护熔炼高氮马氏体不锈钢
After the initial inertisation we have to apply a small flow of Nitrogen to dilute possible leakage from atmosphere.
初始惰性保护后，使用较低流量的氮气来稀释可能由泄漏进入的空气。
Content of nitrogen and property of deposited metal of self-shielded fluxed-cored wires
氮强化自保护药芯焊丝氮含量及性能分析
Study on Simulation Analysis of N_2-Ar Protecting TIG Welding Arc;
氩氮保护TIG焊电弧特性的模拟研究
Weatherproof or explosion proof electric actuator.
电动执行机构的气候保护或防爆保护。
preserve peeled potato with nitrogen
用氮气保存去皮的马铃薯
vacuum and inert atmosphere rolling
真空和保护气体中轧制
inert gas tungsten arc welding
钨板惰性气体保护焊
AC gas metal-arc welding process
交流熔化极气保护焊
tungsten inert gas welding
钨极惰性气体保护焊