Meteorological balloon; medical butyl stopper; latex; high strength waterproof cloth; various mould cover; Rubber sundry piece; latex products; latex products test & examination; rubbers test & examination; industry service; scientific research development; internal and external wall coating, purified propyl latex; various acrylic ester copolymer latex bond; non-woven cloth special bond; sound insulation damp dope special latex; acrylic ester elastic waterproof coating and latex; new type environment protection