... Packer(Liquid packer) for Rock Reinforcement,Injection SystemsDescription:Grouting for the coal mine with seal is piling, grouting of grouting and the ... special one-time mouth sealing seal, with light and fast for the simple, etc.Advantages: good sealing, sealing rapidly, ... the internal for steel tube and the plastic pipe two types, the internal for plastic seal is mainly used for surface for the ...