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单词 fall
释义 fall
[fȯl]
ASTRONOMY
1. Of a spacecraft or spatial body, to drop toward a spatial body under the influence of its gravity.
2. See <<autumn>>
ENGINEERING
The minimum slope that is required to facilitate proper drainage of liquid inside a pipe.
MECHANICAL ENGINEERING
The rope or chain of a hoisting tackle.
MINING ENGINEERING
A mass of rock, coal, or ore which has fallen from the roof or side in any subterranean working or gallery.
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