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单词 θ207314
释义
society > travel > air or space travel > regulation and control of flying > [noun] > placing aircraft in landing sequence > aircraft waiting in landing sequence (3)
stack-up1945

The arrangement of objects in a stack or pile; a build-up. spec. in Aeronautics = stack, n. 1e.

stack1947

Aeronautics. A series of aeroplanes circling at different altitudes and awaiting landing instructions.

traffic stack1947

a number of aircraft circling at different altitudes around the same point while waiting for landing instructions; = stack, n. 1e.

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