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1·Ductile Iron Pipe and Fitting.

球墨铸铁管件。

2·As a result, it is feasible that making of ductile iron pipe use of semi-steel.

结果表明：用冶炼高钛渣的副产半钢生产球墨铸管在工艺上是可行的。

3·The main properties of RPM pipe are introduced and compared with the properties of the plastic pipe, steel pipe, ductile iron pipe and reinforced concrete pipe.

本文介绍了RPM管的主要性能，并与塑料管、钢管、球墨铸铁管及钢筋混凝土管的相应性能作了分析和比较。

4·The two special cement coatings are applicable to sewage pipeline internal corrosion for ductile iron pipe, improve the ability to resist the erosion of acid components in sewage.

这两种特殊水泥涂层均适用于污水管道用球墨铸铁管的内防腐，提高抵抗污水中酸碱成分的侵蚀能力。

5·The distribution of chemical composition and microstructure for cracking socket of centrifugal cast ductile iron pipe, and the effect of them on the cracking behavior have been studied.

分析了离心球铁管开裂承口的组织、成分分布，探讨了组织、成分对承口开裂的影响。

6·The composition, control principle and dynamic characteristics of time series pulse combustion control system applied to the annealing furnace in Beitai Ductile Cast Iron Pipe Plant are introduced.

主要介绍了北台球墨铸铁管厂退火炉时序脉冲燃烧控制系统的组成、控制原理和动态性能，指出时序脉冲燃烧控制方式的优点以及在引进应用中应注意的问题。

7·The annealing process of centrifugal ductile cast iron pipe by the heated mould method is studied.

研究了热模法离心铸造球铁管的退火工艺。

8·Main products include ductile manhole covers, composite resin covers, drill rod cement covers, galvanized steel grating, polymer alloy covers, cast iron manhole covers, flower bar, cast iron pipe.

主营产品有球墨井盖、复合树脂井盖、钢钎水泥井盖、镀锌钢格板、合金高分子井盖、球墨铸铁井盖、铸铁井盖、花栏、铸铁管等。