The fire pump jointer of the utility model comprises an iron screw cap, a copper ring, and an iron body pump.

本实用新型解决了目前消防水泵接合器中铁螺旋盖和铁制体泵接口处的铜圈容易被盗窃的问题。

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Detailed knowledge about the motor design, production (such as casting, copper ring and copper bar) and commissioning.

熟悉电机设计，生产(如铸造，铜环和铜棒处理)和调试。

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With copper ring instead of silver ring, this collector is fully reliable for measurement and able to largely reduce its manufacture cost.

它以铜环取代了银环，测试效果完全可靠，并大大降低了集电器的制造成本。

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His special report The Copper Ring investigated a multi-billion dollar international fraud designed to manipulate the world's copper markets.

BBC: ABOUT MONEY PROGRAMME

In order that the foil does not fall apart, each transparent ring is actually a series of curved slots in the copper rather than a continuous gap.

ECONOMIST: The search for alien life