无焊料的

It is used for pressure and vacuum of ammoniac liquid and gas as well as of zhe madia which cannot corrode carbon steel, stainless steel and solders like tin and lead.

仪表适用于测量氨的液体和气体的压力真空，也可测量对碳钢、奥氏体不锈钢和锡铅类焊料无腐蚀作用的介质的压力和真空。

It is used for pressure and vacuum of ammoniac liquid and gas as well as of zhe madia which can't corrode carbon steel, stainless steel and solders like tin and lead.

仪表适用于测量氨的液体和气体的压力真空，也可测量对碳钢、氏体不锈钢和锡铅类焊料无腐蚀作用的介质的压力和真空。

The experimental results show that the melting point of Sn-3Ag-1.5Sb-xCu solder decreases with Cu addition and the solder with 1.0 wt-%Cu is a narrower mushy range between solidus and liquidus.

本研究在探讨对Sn-3Ag-1.5Sb无铅焊料中添加0~1.5wt_%Cu对其焊点於焊接后与高温热储存后的微观组织及拉伸强度的影响。

And development, applications, processes and current practices relating to all areas of soldering and surface mount technology.

该刊涵盖了从合金、浆料、焊剂到可靠性和环境影响的SMT所有方面的内容，在当前，为无铅焊料和工艺相关知识的传播提供了一个重要的传播途径。

This is especially important for Pb-free solders because such a durability model is not currently available.

这是 特别重要的无铅焊料，因为这样的耐久性模型是当前不可用。

With the concern of environmental protection and made a lot of efforts to develop Lead-Free solders.

伴随着对环保的关注并且努力发展无铅焊料。

Ammonia pressure meter is a special meter for ammonia, used to measure various non-crystallized and solidified medium that have no corrosive action on common carbon system steel, alloy structural steel, Austenite stainless steel, or tinsel bar solder, principally applicable for measuring pressures of liquefied ammonia, gas, or other mixtures in cooling equipments in chemical fertilizer production.

简介 氨压力表为氨专用仪表，用于测量对普通碳钢、合金结构钢、澳氏体类不锈钢及锡铅合金钎焊料无腐蚀作用，非结晶和凝固的氨气、氨液介质的压力。主要适用于化肥生产过程中设备或其他中用来测量氨的液体、气体或其混合物等的压力。

This company is a scitech enterprise mainly involved in researching, developing, and producing tin solder thread,tin solder bar,tin solder paste, solder, environment-oriented detergent, and industrial soft solder materials.

本公司是一家主营焊锡丝、焊锡条、无铅焊料、焊锡膏、助焊剂、环保型清洗剂等电子、电工业用软钎焊用材料研发与生产的科技型企业。

SnAgCu lead-free solder powders were prepared by close-coupled gas atomization. The effects of gas atomization pressure and melt superheat on the powder size and morphologies were investigated.

摘 要：采用紧耦合气雾化法制备SnAgCu无铅焊料合金粉末，研究雾化压力和熔体过热度对粉末粒径和形貌的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。