- non reinforced
- u tiffened
- unstiffened
- 非: mistake; wrong; errors
- 加强: strengthen; enhance; augment ...
- 的: 4次方是 The fourth power of 2 i ...
- 非加强板: u tiffened plate; unstiffened plate
- 加强的: beefed up; beefed-up; extra strong; fortified; intensified; reinforced; sforzato; stiffened; sturdy
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