Fatigue offshore
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Article
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1980
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Elsevier Science
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English
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is a small lightweight keyboard which allows simultaneous input of alphanumeric and digitized data. Its size (167mm x 100ram x 15ram) and weight (130g) make it suitable for use with Summagraphics digitizers. The RS232C interfacing (or on special order 20mA current loop) makes the keyboard suitable