A shaving unit that comprises at least one blade and a skin engaging member that has a surface for engaging the user’s skin adjacent the blade edge is described herein. The mobile communication system is managed by mobile switching centers having base station controllers and base stations under their control. The method then chooses the operating point with the highest performance among the available operating points that will still meet budgetary constraints or specific thresholds of power consumption. The mating portion has a plurality of bulged elements spaced from each other to form a plurality of holding spaces. The neck portions and the vessel base-valves at the one sides of the plural high pressure gas vessels are accommodated in the accommodating portions of the vessel mounting member 1, and the plural high pressure gas vessels are mounted in the vessel mounting member, enabling the gas flow passage 6, formed in the vessel mounting member, to serve as a high pressure conduit portion.