JF4 (youtube channel)

Posted by cest73

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cest73

JF4 (youtube channel)
September 14, 2016 08:21PM

Registered: 8 years ago
Posts: 856

zero G skirmish

"The initial 90% of effort and time is needed to do the first 90% of work,
to do the remaining 10% of work; remaining 90% of effort and time is needed."

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