A microwave heating construct may include a widened base. The honeycomb-structured lining board including fiber sheets stacked with a predetermined thickness has advantages of lightness, high impact-resistance and high noise-proofing due to high sound absorptiveness. The release mechanism has a rotatable bail lever with a cam lobe that pivots about a pivot point and presses against a bearing surface of the fiber optic module. The interrupt may be provided to a controller, which then performs the necessary processing to effectuate the next splice.