... mouth sealing seal, light,fast. 3.stopping water Mine Filling Packer(Liquid packer) for Injection SystemsDescription:Grouting for the coal mine with ... : good sealing, sealing rapidly,Has the internal for steel tube and the plastic pipe two types, the internal for plastic seal ... , when the openings for was cut off, protect coal winning machine from destruction.FKJ-38/5.5: suitable for 40-48 ...