progressive speed trial 递增速率试验 ; 逐级加速试航
Balance and eye movement training to improve gait in people with progressive supranuclear palsy: quasi-randomized clinical trial.
在进行性核上性麻痹者中进行平衡和眼球运动训练以改善步态：半随机临床试验。
After debugging and trial production, the components of cardboard progressive die have produced an ideal effect.
卡板模具经调试、试制，零件成形效果理想。
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