Like the Yongzheng marks on the current vases, the Qianlong mark on the small Taipei vase is a four-character mark written in blue enamel within a double square.
台北故宫珍藏乾隆瓶是用蓝色珐琅彩署双圈四字楷书款，其样式与本拍品的雍正款相同。
Double square root (DSR) equation has provided a new theoretical framework for developing wave equation migration.
双平方根(dsr)方程为波动方程偏移提供了一种新的理论框架。
The method of stack velocity analysis based on relief surface presented in the paper uses double-square-root equation to compute the travel time of reflections, which is suitable to use in the area w.
本文提出的基于起伏地表的叠加速度分析方法，应用双平方根方程计算反射波的旅行时间，可适用于地形起伏剧烈地区。
Structural principle includes consecutive double-square and four-square principles.
构成法则可以分为二方连续、四方连续法则。
Structural principle includes consecutive double-square and four-square principles.
构成法则可以分为二方连续、四方连续法则。
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