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1 <br />Ll <br />A <br />64 HOLE PATTERN <br />0.6 P. F. <br />20 FT. x 30 FT. <br />DOWNHOLE <br />DELAY MS200 ms250 ms300 ms350 ms400 ms460 ms500 m8600 <br />PERIODS TRUNK LIME <br />200 250 300 350 4003 450 500 600 <br />'7 L <br />242 292 342 392 442 482 <br />284 334 384 434 484 534 <br />-i2/ <br />2 642 <br />4 684 <br />326 376 426 476 526 576 626 726 <br />IZ <br />368 418 468 518 568 618 688 768 <br />�ZI/ <br />4 10 460 510 560 610 660 710 810 <br />4z, <br />L <br />452 502 552 602 652 702 752 852 <br />j ?i <br />494 544 594 644 694 744 794 804 <br />ms 42 SURFACE DELAYS _5bal e5 <br />o cev <br />=2HOLE,cS/DELAY PERIOD <br />0 DELAY TIMING AT EACH HOLE <br />200 <br />FIGURE 3.4 -4 TYPICAL DELAY SCHEME <br />335 <br />REVISED X 813.87 <br />