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。
2
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.
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.