A method for inspecting small holes in a material is disclosed. Frame sections have opposite sides provided with support arms that taper from top to bottom for reduced material requirements. Also, the chip antenna is configured to lead a main radiation on the conductive plate, thereby increasing radio reception quality and improving radio performance. The airbag can support weight of the top drive. The presence information is configured as partial presence information comprising less than a total of the presence information available for the presentity. The mobile base station transmits the media data from the mobile base station to a handheld device through a packet data protocol context.