| http://www.w3.org/ns/prov#value | - With the by-pass, unit placed in the service pipe and the gasket rings set in holding and sealing condition as indicated in Figures 8 and 9, the wrench device is withdrawn and the bore of the by-pass unit is then clear of obstruction so that the gas or other fluid to be taken care of can fiow freely therethrough and with no leakage and seepage of the gas or fluid into the premises.
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