In 2008, Intel showed off its take on wireless power solutions, while at the Consumer Electronics show in Las Vegas earlier this year, several manufacturers unveiled wire-free charging devices.

在2008年，英特尔公司将它的无线供电解决方案炫耀了一把，而在更早些年的拉斯维加斯消费电器展上，几个生产商便展出了无线充电设备。

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Response of a US copper wire manufacturer: US wire and cable manufacturers purchase about 70 percent of the copper mined in the US.

一家美国铜线制造厂商的回应：美国的铜线和电缆制造厂商每年在国内采购大约70%的铜矿。

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Chang, and industry was established in 1998, is a collection development, production and sales as one of the wire and cable manufacturers.

和昌电业成立于1998年，是一家集研发、生产及销售为一体的电线电缆制造企业。

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And since consumers do not think about power consumption when choosing a phone or laptop, manufacturers tended to stick with copper wire.

ECONOMIST: How a boring gadget saved $2 billion-worth of electricity

The technology for this has been available for many years and costs only around 30% more than the copper-wire method, but the market gave manufacturers little incentive to switch.

ECONOMIST: How a boring gadget saved $2 billion-worth of electricity