An adjustable lens device includes a fixing seat, an adjusting seat sleeved on the fixing seat, and first and second lens modules mounted to the fixing seat. The reissue of instructions is possible without lowering the efficiency of the instruction scheduling process by dividing the function of scheduling instructions and the function of the reissue of instructions. This cushioning deflection absorbs vibrational movement due to chordal action of the interengaging flutes, and thereby reduces noise level and roll wear and improves the quality and consistency of corrugation. A gypsum-based coating formulation making use of the dry gypsum composition is also disclosed. , a graphical user interface, through a display. The cluster is linked with the main station andor the zone network by a long-range link.