利用数值模拟方法计算了双水套中水的流场分布，确定了关键的设计参数。
Calculates the distribution of inside water flows with numerical simulation, determines the key design parameters.
酸液向地层的滤失参数，是压裂酸化设计时确定裂缝几何尺寸及裂缝闭合时间最关键的参数之一。
Filtrateloss parameter of acidizing fluid is one of the key parameters to determine fracture geometry and the time of closed fracture in fracturing and acidizing design.
对玉米自动移栽机的关键部分——取苗机构进行了结构设计和参数确定，并进行了性能试验。
The structure and main parameters of the picking seedling machinery, which is the key component of the maize auto transplanter, are designed, meanwhile, the performance tests are carried on.
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