我写的采集规则测试都正常，为什么不能采集？？

这个站为什么不能采集？http://www.elecfans.com/article/88/97/
我写的采集规则测试都正常，为什么不能采集？？
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我的是第一次采集正常，第二次就不能采集了

不能用很正常，有很多网站都有限制，采集不了
https://discuz.dismall.com/thread-1357770-1-1.html