Horizontal sand

横砂───Horizontal sand

governing equations for a planar horizontal sand jet with interphase slip and heat transfer are constructed, and solved with the aid of the modified and extendcd general program.───构造了存在相间滑移和换热的平面水平含沙射流的封闭控制微分方程组；

Nanjing sand is anisotropic because of the schistous grain. Its horizontal strength is greater than that in vertical.───片状颗粒成分使得南京砂具有各向异性的性质，其水平向强度小于垂直向强度。

perforation technology optimum and optimal design of the sand control tubular string provided scientific basis for perfecting and enhancing sand control technology in horizontal well.───水平井射孔工艺优选和防砂工艺管柱的优化设计，为完善和提高水平井防砂工艺提供了科学依据。

Other types of sand filters include horizontal sand filters and riverbed filters (suitable only where the bed is permeable).───其他形式的沙过滤器包括水平沙过滤器和河床过滤器（仅适合穿透性河床）。