This Advisory Circular (AC) provides guidance on obtaining a foreign acceptance or validation of civil aeronautical product and article which has been received or applied for a CAAC design approval.

To see a fine example of station design under Pick's guidance, we travel south to Piccadilly Circus and emerge onto its magnificent circular ticket hallway.

Double-column structure, a saw-oriented party to adopt a circular rail, and ensure guidance accuracy and reliability of sawing.