Query4All.com
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Data generated from past analysis.
https://zh.wikipedia.org/wiki/%E6%89%A9%E8%82%9B
https://baike.baidu.com/item/%E6%89%A9%E8%82%9B/1175268
https://zhuanlan.zhihu.com/p/488935386
https://www.taobao.com/list/product/%E6%83%85%E8%B6%A3%E7%94%A8%E5%93%81%E6%89%A9%E8%82%9B.htm
https://www.pornhub.com/video/search?search=%E6%89%A9%E8%82%9B
https://www.taobao.com/list/product/%E8%82%9B%E9%97%A8%E6%83%85%E8%B6%A3%E6%89%A9%E8%82%9B%E5%99%A8%E7%94%A8%E5%93%81.htm
https://cn.pornhub.com/video/search?search=%E6%89%A9%E8%82%9B
https://patents.google.com/patent/CN204815319U/zh
https://patents.google.com/patent/CN202982897U/zh
http://www.zhqkyx.net/article/doi/10.16766/j.cnki.issn.1674-4152.000619