An apparatus and method for inflating and curing a resin impregnated liner include a resin impregnated liner lowered into an underground structure so that a portion of the liner extends beyond the structure. The protruding portion of the liner is then sealed. Pressurized air and steam are simultaneously...http://www.google.com.hk/patents/US5490744?utm_source=gb-gplus-share專利 US5490744 - Method and apparatus for inflating and curing a resin impregnated manhole liner
