摘要
Abstract
With the widespread use of natural gas in the city, the pipeline gas appears situations of the requiring repair and transfer tube can not be avoided. In order to make the cons-truction more reasonable on the gas pipeline, a kind of high sa-fety, good economic performance, convenient operation, and energy efficient on-line blockage transmission technology has been widely applied.关键词
不停输/封堵/膨胀桶式/探讨Key words
on-line/blockage/expansion barrel type/discuss-ion
