A polymer-impregnated paper-based web for use as a medical packaging bacteria barrier fabric is provided. These are excellent in the friction regulation effect, capable of reducing transmission shock, are high in the friction coefficient required for power transmission, and in addition, are excellent in wear resistance. A carry handle surmounting the cap is connected to the cap by one or more support uprights, to allow the gas distribution assembly according to the invention to be transported. Further powder ingredients can be added to the components in the pan mixer by means of a powder ingredient supply system. The presented antennae system reduces the minimum amount of isolation required for stable operation. Thus, the present invention provides a needle threading machine, in which a thread is stably hooked on a hook, thereby reducing a defective needle threading work and enhancing productivity.