Liquid water soluble polymer suspensions in non-aqueous solvents are extremely stable over long periods of time with minimum separation of the solvent and no hard packing of the dispersed water soluble polymer. A base corresponding to the canister is configured to mate with the open end so as to detachably close the open end. The error correction needed at the sub-block level is determined from a measurement of the back ground noise floor. Imaging of the said treatment effect on the VP in time and space can thus be made simultaneously with the present invention proposed treatment and provide real time feedback on the progress and effect of the treatment described by the present invention. Moreover, described are an operating and display module, as well as to a combination of an electronic equipment and an input and output device that can be detachably mounted thereto. The droplet removal structure is operative to set the opening degree of the air flow rate control system to have a droplet removal opening degree to increase a speed with which the air flows and allows the air to flow at the droplet removal opening degree for blowing off the droplets adhered to the air flow rate control systems.