... narrow beam 窄束 narrow beam injection laser 窄束注入式激光器 narrow central pencil 中心细光束 ...
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... 窄隙防爆式电机：lamina explosion-proof electric machine 窄束注入激光器：narrow beam injection laser 窄束测深仪：narrow-beam sounder ...
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narrow w beam injection laser 窄束注入激光器
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