Это что-то новенькое

Пытался тут намедни расшинковать буржуйский сайт на предмет meta-тегов, и понял, что моя безграмотность еще глубже чем я думал.

Может ли кто-нибудь объяснить о смысле следующих строк, и зачем некоторые из низ повторяются?

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Собственно, если я тут слишком много напостил, то вот сам сайт http://www.extreme4x4.com/