positive ion beam [物] 正离子束
beam positive 正电粒子射柱
positive electron beam photoresist 正性电子束光刻胶
electron-beam positive photoresist 电子束正性抗蚀剂
slow positive electron beam 慢正电子束
positive electron beam resist 正性电子抗蚀剂
positive e ion beam 正离子束
The gliding longitudinal wave contains three parts, longitudinal wave beam, negative exponential gliding ivro-tational wave and positive exponential gliding irrotational wave.
滑行纵波系由纵波声束、负指数滑行集散波和正指数滑行集散波三种成份所组成。
The beam characteristics with positive and negative branch unstable resonators were compared for end-and edge-pumped lasers.
在端面抽运和边缘抽运时，比较了正支和负支非稳腔的输出光束特性。
Objective To investigate the image features and clinical values of electroencephalogram(EEG)and brain electrical activity map(BEAM)for the mild brain injury without positive presentation on CT scan.
目的研究脑CT检查为阴性的轻型颅脑损伤的脑电图（EEG）、脑电地形图（BEAM）变化特点及其临床价值。
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