PWECPan Western Energy Corp. (Tulsa, OK)
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From this Figure we note that the technique adopted allows, at this level, just the recovery of the Pseudo Word External Contour (PWEC).
The remaining contour (RC) is obtained by a logical 'AND' between the inverse of the external contour of the PW (PWEC) and the Contour of the Entire Text (CET):
Fill the white PWEC. The result is a White PW (WPW) as shown in Figure 6.