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.
为了看一看匹克指导设计的车站，我们向南行来到皮卡迪利广场宏伟的圆形售票大厅。
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Double-column structure, a saw-oriented party to adopt a circular rail, and ensure guidance accuracy and reliability of sawing.