An apparatus produces a stator in which grooves are provided at the inner or outer periphery in mutually spaced relationship to receive a stator winding. Every propeller blade, at its blade base, has a primary adjustable bearing and a secondary adjustable bearing and is received so as to be rotatable along its longitudinal axis inside a blade seat. A water dispensing amount of the container combination is controlled by installing and screwing the water dispensing device of the containing unit and the upper end on the receiving unit at the lower end by hand to allow to predetermined control of the water dispensing amount. The at least one additive compound also neutralizes acid generated by the PAG without consuming the acid and does not absorb much light in the exposure areas.