sector scanning 扇形扫描 ; 扇形扫掠
sector scanning sonar 扇形扫描声纳
sector-scanning sonar 扇形扫描声纳
sector scanning controller 扇形扫描控制器
phased array sector scanning 相控阵扇形扫描
electronic phased array sector scanning 电子相控阵扇形扫描
electronic sector scanning type sonolayergraph 电子扇形扫描式超声切面诊断仪
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