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cross laser liner
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cross laser liner
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cross laser liner
激光投线仪
利用准直激光束经过柱面透镜变换成一个扇形激光平面,投射到墙面等物体上,形成一条明亮的激光投射线。又称激光标线仪、激光划线仪。
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benign tumors of salivary glands
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