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"Petzval Lens \u93E1\u982D\u4E0B\u7684\u9999\u6E2F\u591C\u8272"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.lomography.tw/magazine/251080-the-petzval-captures-bright-lights-in-hong-kong-city-tw>