... beam ratio,声束比 beam spot diameter,束斑直径 beam-deflection ultrasonic flowmeter,声速偏转式超声流量计 ...
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It is also evident that for metallic and non-metallic microbeads the momentum coupling efficiency has different variation tendencies versus the focused beam spot diameter.
实验中还发现，金属小球和非金属小球的动量耦合系数随脉冲焦斑直径的变化趋势完全不同。
Good beam quality, close to the basement membrane, small spot diameter, perfect for ultra-fine marking.
光束质量好，接近基膜，光斑直径小，完美适用于超精细标记。
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