skyhook system
天钩系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
He also invented the Skyhook, an air rescue system that involved an airplane and a large helium balloon.
VOA: special.2009.01.14
In 2003, Skyhook pioneered the development of the Wi-Fi Positioning System to provide precise and reliable location results in urban areas.
ENGADGET: Motorola gives Google the boot, turns to Skyhook for location services
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