A metal hydride hydrogen storage unit utilizing compartmentalization to maintain a uniform metal hydride powder density thereby reducing stress on the vessel due to repeated cycling. The pulsating vibration air generation apparatus is comprised of a main body having a tubular hollow space R2 with which two air communication ports are associated, and a rotary body situated for rotation in the tubular hollow space R2 and which has a peripheral side surface S4c so as to slide on the inner surface S2c forming the tubular hollow space R2. The program instruction pairs in the compiled program code are processed while verifying an order in which the program instruction pairs are to be executed using the compiled tagging code, which is loaded into a tagging buffer.