This paper describes hydrogen shield diffusion braze welding technology for precise parts of copper and compound metal.

本文阐述的是，铜及其合金精密零件氢气保护扩散钎接焊工艺问题。

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This article introduces inner compound metal pipe manufacturing technology of the cold forming method, heat extrusion method and centrifugal foundry method as well as welding method.

介绍了国内外主要开发应用的冷成型法、热挤压法、离心铸造法和焊接法等内复合双金属复合管制造技术。

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Inner compound metal pipe is used for the transmitting of liquid medium, it is not only prevent the harmful medium from corrosion of the pipe, but also save lots of metal material and reduce the cost.

内复合双金属复合管，用在流体输送中既有效的防止流体中有害介质对管道的腐蚀，又节约了大量的贵金属材料，从而降低了成本。

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Leaving this annex area we passed through a metal door in an internal compound wall and came into a pleasant lawn area, in the middle of which was a small structure that was used by the residents as a sun room.

CNN: A visit to Osama bin Laden's lair

In the middle of the compound, there is a giant cage with huge metal grilles.

BBC: Mentally ill patients in Indonesia held in chains

It was little more than a razor wire and mesh compound of cages, protected from the elements by a metal roof.

CENTERFORSECURITYPOLICY: Guantanamo Bay: five years later