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40 Principles: TRIZ Keys to Technical Innovation (Triztools) 40 Principles: TRIZ Keys to Technical Innovation (Triztools)
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Edwin Chung
Edwin Chung is on page 112 of 141
— Mar 12, 2016 01:08AM Add a comment
40 Principles: TRIZ Keys to Technical Innovation (Triztools)

Edwin Chung
Edwin Chung is on page 105 of 141
— Mar 10, 2016 04:41AM Add a comment
40 Principles: TRIZ Keys to Technical Innovation (Triztools)