In the 1910's and 1920's many people "hacked" on crystalsets to take advantage of the new high tech world of radio.
在1910年和1920年，许多人“黑”掉水晶套，从而利用无线电的新高科技世界。
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Cat whisker a fine metal thread resembling the arched shape of a cat's whisker used in early radio wave detecting crystalsets.
金属细线一种质地良好的金属线，类似于猫的胡须，呈拱形。早期应用于无线电波检测晶体装置。
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And similarly old crystal radio sets and more recently modern radio frequency identification (RFID) tags, increasingly used in shipping and as antitheft devices, are powered purely by radiowaves.