... 平行波束 parallel beam 斜射波束 angle beam ; squint beam ; squint beam 锥形波束 conical beam ; cone shaped beam ...
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... 园锥形光罩 snoot 锥形光束 cone shaped beam; cone-shaped beam; conical beam; pencil-beam light 椭圆形光纤 elliptical optical fiber ...
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cone-shaped beam [光] 锥形光束
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