名词
中文翻译：三层级激光棒
同义词：
['three-level laser', 'three-level laserrod']
例句：
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1. The three-level laser rod is used for precisecutting and welding.
三层级激光棒用于精确切割和焊接。
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2. This three-level laser rod can be used invarious industrial applications.
这种三层级激光棒可用于各种工业应用。
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3. The three-levellaser rod has a unique feature that allowsit to work efficiently even in low lightconditions.
这种三层级激光棒具有独特的特性，即使在低光条件下也能高效工作。