A method and apparatus are provided for substantially containing dust generated along a fiber tow path extending from a creel to a compression roller in an automated fiber placement machine, by enclosing substantially all of the path of the fiber tows between the creel and the compression roller within a barrier that is substantially impermeable to dust. The storage device emulates a logical memory space, which is mapped on a physical memory space of the flash memory. A secondary-electron emitting material is arranged on the top of a region from the electron-emitting part to the high-potential electrode, so that secondary electrons are efficiently emitted to the anode, thereby to contribute to efficient electron emission. If the trigger information is of the preparation trigger type, the broadcast receiver acquires information on the location of the file which belongs to the target object identifier. The firearm pin assembly may have an aperture for installing a detent and detent spring.