A strip-map Synthetic Aperture Radar auto-focus image generation process is provided. In order for a user to send an instant message, the user selects a create message display screen, enters a text message using the mobile unit device’s keypad, and then selects a recipient from the address book user interface screen. Irradiating the alloy powder or powder mixture which has been positioned on the surface of the aluminum alloy substrate using a laser melts together with the alloy or powder mixture and a superficial part of the aluminum alloy substrate. The front plate can have a center hole that receives, and holds the rounded head of the supporting rod from escaping. The first and second interlocking adapter plates are interlocked by placement of one plate into the other and by subsequent rotation.