main shaft dip angle 主轴倾角
The main hint of a slowdown has come from an unexpected dip in industrial production in April.
经济放缓的主要线索来自于四月份工业生产量的意外减少。
This photo, taken in the winter months of 1942, shows citizens of Leningrad as they dip for water from a broken main, during the nearly 900-day siege of the Russian city by German invaders.
这张照片拍摄于1942年冬天，展现了在德国侵略者对列宁格勒近900天的围攻期间，该市市民在破损的管道中取水的场面。
The main factors influencing the gas preservation condition includes the fault amplitude, fault fragmented intervals, fault surface dip, and the position of fracture cavity system in the faulted zone.
大断裂影响缝洞系统保存条件的主要因素包括：大断裂断距、断层上消失层位、断面倾角、盖层厚度以及缝洞系统所处断裂带位置等。
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