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t <br /> <br />IA <br />64 HOLE PATTERN <br />0.6 P.F. <br />20 FT. x 30 FT. <br />DOWNHOLE <br />DELAY <br />PERIODS <br />ms 42 SURFACE DELAYS <br />2 HOLES/DELAY PERIOD <br />O DELAY TIMING AT EACH HOLE <br />200 <br />FIGURE 3.4-4 TYPICAL DELAY SCHEME <br />3=35 <br />REi11SED FFB 1'i'87 <br />ma200 ms250 ms300 ms350 ms400 ms450 ms500 ma600 <br />ro~iu v i iuc <br />