A cooling system for use in a work machine is provided, in which an increase in the load imposed on a fan driving circuit and occurrence of abnormal noise can be prevented without fail by means of an inexpensive arrangement at the time of switching the rotating direction of a cooling fan. The first module includes a first chassis and a first movable member supported by the chassis, wherein movement of the member causes flow of ink from the first ink supply. In some embodiments, a type of shielding mesh is selected to make more routing area available in locally congested areas. This in turn enables the DAC to operate with a higher update rate. Information is presented to the user based on a combination of the first metadata and the second metadata. The OFNC, in one embodiment, establishes a routing path between the cellular base station and the PDN for an authenticated UE via a group of routers based on information obtained from an authenticating server and a charging system.