Compounds of a formula wherein, A represents formula R3 is a hydrogen, lower alkyl et al; m is 0 or 1; R1 is a hydrogen atom, halogen atom et al, R2 is a hydrogen et al; p is 0 to 4; X is a carbon atom or nitrogen atom; and X1 to X4 is a lower alkyl et al, or pharmaceutical acceptable salts thereof. The direction valve is a hydraulically actuatable direction valve having two first and two second switching ports, interconnectable in three positions, and two hydraulic control ports which are either indirectly or directly, connected with said pump unit. The method may also include generating the 1’s complement of the first product, generating a second product by multiplying the 1’s complement and the quotient approximation, normalizing and truncating the second product to obtain a quotient, and storing the quotient in memory. The control mechanism having a configuration in which it prevents opening of the closed channel and thereby prevents leakage of application liquid from the reservoir prior to manual activation by a user. Collection of freshwater from hot humid ambient air is also provided for other uses, such as irrigation and farm animal drinking.