乙炔气

For example, acetylene generated by the carbide process contains arsenical and sulphur compounds, and other impurities, which must be removed by scrubbingwith concentrated sulphuric acid before it is sufficiently pure for reaction with hydrochloric acid (此处有误,应为hydrochloride氯化氢) to produce dichloroethane.

例如，由碳化钙发生的乙炔气含有砷和硫的化合物以及其他的杂质，必须在乙炔有足够的纯度与氯化氢反应制造二氯乙烷之前，用浓硫酸洗去这些杂质。

The present invention has the hot treating furnace pre-vacuumized to 10-100 Pa, introduced with high purity nitrogen and heated to 900-1050 deg.c, before maintaining and introducing acetylene gas to carburize at nitrogen pressure of 0.1-0.11 MPa and acetylene gas pressure of 5000-20000 Pa.

本发明通过向设有炉内循环风机的热处理炉进行预抽真空至10-100Pa，通入高纯氮气，再将炉温升至900-1050℃，保温后再通入乙炔气进行渗碳，炉膛内氮气的压力为1×10 5 -1.1×10 5 Pa之间，充入的乙炔分压为5000-20000Pa之间。

First,adding the calcium carbide to react with the water in sodium pyrosulphate to get acetylene gas,then the acetylene content is determined by gas chromatograph,therefore the water content in the sample can be calculated.

先用电石将水分转化为乙炔气，然后用气相色谱仪检测乙炔的含量，从而得出样品中水分含量。

Then acetylene black is obtained and collected.

乙炔黑是用电石制成乙炔，把净化后的乙炔气在高温下隔绝空气进行热裂解后，冷却收集制得的高性能炭黑

The merits of the acetylene gas and the defects of new type of welding gas are completely mixed together on the aspect of theory and practice .

理论和实践上把乙炔气的优点和新型焊割气存在的缺点完整的捏合在一起。

The status of VCM and acetylene gas recovery by pressure swing adsorption in vinyl chloride production units were introduced.

介绍了在氯乙烯生产装置中，采用变压吸附工艺回收精馏尾气中的VCM和乙炔气的情况。

At the same time guarantee the quality of welding and cutting, to improve the safety in production and productivity factor, acetylene gas to reduce the cost of production of nearly one million each year.

保证焊割质量的同时，提高了安全生产系数和生产效率，乙炔气生产成本每年降低近百万元。

Chiron Corporation developed a new industrial gas, energy conservation, environmental protection, cutting significantly reduce operating costs and become fully replace the high energy-consuming and high pollution of the new industrial gas acetylene gas source, the industrial enterprises are generally welcomed.

公司研制的凯龙新型工业燃气，节能、环保，大幅度降低切割作业成本，成为全面取代高耗能、高污染的乙炔气的新型工业气源，受到工业企业的普遍欢迎。

It is the filling material in argon arc welding and oxygen-acetylene gas welding for the aluminum alloy weldment expect the Al-Mg alloy, it can get the better effect in deal with the heat crack of the strengthening Al-alloy.

HS311 AWS ER4043 除铝镁合金以外的的铝合金工件和铸铁氩弧焊及氧-乙炔气焊时作为填充材料，特别对易产生热裂缝的热处理强化铝合金，可获得较好的效果。

It is suitable to be used as filling material for oxygen-acetylene gas welding and carbon arc welding, and also for manual braze welding. It is the ideal material for welding of copper alloy, copper, gray cast iron and hard alloy knife and etc.

HS221 JIS ZYCusN 适用于氧-乙炔气焊及碳弧焊时作为填充材料，也可用于钎焊，是铜合金、钢、灰铸铁及硬质合金刀具等焊接材料中较为理想的焊接材料。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。