http://blacklion.livejournal.com/ ([identity profile] blacklion.livejournal.com) wrote in [personal profile] iskatel 2011-06-11 10:00 am (UTC)

Если только недавно стали говорить про пульсацию светового потока и его негативном влиянии,
Недавно — это 20-30 лет? Почитайте учебники по безопасности труда 20-30 летней давности — там всё это было.
(46 comments)

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