Objective To observe the sound attenuation effect of several kinds of hearing protectors (earplugs and earmuffs) in an infrasound generator sound field.
目的观察几种护耳器（耳塞、耳罩）对次声发生器次声场的隔声效果。
Applying the design scheme, a nonlinear integrated control law with objective holographic feedbacks (NICOHF) was derived for the condensed steam generator.
运用这种设计方法，针对凝汽式发电机，提出了发电机励磁与汽门目标全息反馈非线性综合控制规律。
Objective to investigate the ablation range of Cool-tip radiofrequency generator and its thermal effect on liver cells, intrahepatic artery, vein and biliary duct.
目的研究射频热凝家兔肝组织的热效应范围，并观察肝细胞、肝内动脉、静脉及胆管组织的损伤情况。
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