temporary or permanent blocking encourages a tube.

摘要

SE provides an apparatus for temporarily or permanently BLOCKING THE ENCOURAGEMENT OF A GAS PIPELINE SERVICE (5). In the method, a ball (6) stretchy DRIVES ALONG THE PIPELINE (5) from the end GRIFFIN COUNTER GAS PIPELINE (5) by gas pressure, FORMING THE BALL (6) ADJUSTMENT SUFFICIENT POWER TO RESIST ANY ATTEMPT BY dislodging the gas pressure inside the pipe (5). BALL (6) is forced to a position which is outside the customer premises GAS.