tracing observation

In the light of the characteristics of silt motion, methods such as observation through trial tunnel, model experiment, and sand tracing test, etc. were studied and back silting in the channel after excavation was forecasted.

针对粉沙运动的特性，采用试挖槽观测、模型试验、示踪沙试验等方法进行了研究，并对航道开挖后的泥沙回淤进行了预测。

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Tracing observation of 60 cases on lah in chronic mountain sickness

慢性高原病合并左前分支阻滞60例随防观察

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After many years tracing observation on these carriers, it can be found that ninny of them had chronic hepatitis, liver cirrhosis and liver carcinoma.

但本病患者若进行多年的追踪观察，却发现有相当多的人发生了慢性肝炎、肝硬化、肝癌等所谓的肝病三部曲；

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From 1978 to 1988, twenty cases of chronic empyema patients have been treated with thoracoplasty of segmental costectomy. Through the tracing observation of 20 years, the effects were good.

1978年至1988年间，应用多根多处分段肋骨切除胸廓成形术治疗慢性脓胸20例，经2～10年随访观察，效果良好。

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Tracing Observation and Study on Soft Tissue Tumor of Gardner's Syndrome

Gardner综合征之软组织肿瘤的追踪观察与研究

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Observation of connections between the fibers of the left and right spinal ganglion neurons with retrograde tracing technique of horseradish peroxidase

应用辣根过氧化物酶逆行示踪技术观察左右侧脊神经节间纤维联系

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