return scanning beam
逆程电子束
dual beam scanning system.
双束扫描方式
scanning electron beam brazing
扫描电子束钎焊
Control on electron beam scanning track in brazing
扫描轨迹可控的电子束钎焊
Quantizing aperture low velocity beam scanning image pickup tube
电视摄像管电子束孔低速电子扫描摄像管
Modification of miniature transducer element for forward beam scanning
微探头导管超声换能器声束前向扫描改进的研究
Low velocity beam scanning image pickup tube cheap and rapid transportation
低速电子扫描摄像管收费低速度快的运输
In case of electronic scanning the beam width is broader by a factor of two.
电子扫描时，波束宽度展宽一倍。
The Interlayer Fusion Metallurgy Technology Based on Electron Beam Scanning Control
基于电子束扫描控制的中间层熔炼技术
Diffraction Effects of Laser Beam and Its Influences on Resolving Power of Scanning System
激光束受限衍射对扫描系统分辨本领的影响
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