It is very importance to determine reasonable oil well productivity in the early production period of horizontal well.
在水平井开采初期，合理产能的确定至关重要。
Early in the Uruk period, the use of undecorated utilitarian pottery was probably the result of specialized mass production.
早在乌鲁克时期，使用未经装饰的实用陶器可能是专业化大规模生产的结果。
The period from the Qin to the early Eastern Han dynasty saw a transition in Chinese agricultural production from farming with hoes and spades into farming with ploughs.
秦至东汉中期，我国农业生产仍处于由锄、锸耕向犁耕过渡时期。
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