... 额定二次负荷：rated sencondaryload 二维光正交码：two-dimensional optical orthogonal codes 二气门汽油机：2-valve SI engine ...
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介绍了光正交码和二维光正交码的概念，并对其性能进行了讨论。
The concepts of optical orthogonal code and two-dimensional optical orthogonal code are introduced , and their performance is analysed .
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