optimum observation condition 最佳观测条件
adjustment of condition observation 条件观测平差
ice condition observation 冰情观测
observation of condition changes 观察病情变化
observation of ice condition 冰情观测
observation of water flow condition 水流形态观测
Observation for suspected disease or condition, unspecified 未特指的可疑疾病和情况的观察
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