From the results of the test, with a design and analysis program. The velocity in pipe flow old than new exhaust pipe. The new pipe filling volume of lighter, and from the testing power found that power new filling pipe of the old pipe filling is greater than the average 0.684 indent. Or 2.87 percent, so it is concluded that A filling pipe of a new power over the old pipe filling indent and unlimited, the test volume. Found new pipe filling volume of less than the average number of the old pipe filling 6.883 DB C or 6.059 percent, so it is concluded that From the results of such experiments, volume of new pipe filling the garden. Be less than the old pipe filling indent and no more specific values.
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