concave bottom

The deuterogenous different compact effects can make the lenticle become such with a raised top and a concave bottom which is just like an eyeball.

后期的差异压实作用可使一些河道呈下凹上凸的眼球状反射结构。

The Finite Element Analysis and Optimum Design of a Moving Central Tray in Railway Vehicle with a Concave Bottom

凹底平车移动心盘有限元分析及其优化设计

Through the experiment verified that the hydrodynamic deep drawing technology quality forming a high-lever concave bottom piece of feasibility and achieving high quality forming parts.

通过实验验证了采用充液拉深工艺一次高质量成形内凹底筒形件的可行性，得到了较高质量的成形零件。

The abrasive particles move faster toward the center in the case of larger ultrasonic amplitude or bigger abrasive particles, resulting in concave bottom shape of micro hole.

振幅越大或者磨粒粒径越大，磨粒向中心聚集的速度越快，导致微孔底面出现凹陷状。

The concave bottom mill shoe is used to grind downhole small objects and other unstable fallen objects.

凹底磨鞋可用于磨削井下小件落物以及其它不稳定落物。

On seismic profile cross-cut the channel, it generally presents as a lenticle with flat top and concave bottom and has the character of infilling in reflection.

河道砂岩体在横切河道的地震剖面上一般表现为充填反射状的顶平底凹的单透镜体；

An adhesive dike slot ( 31) is formed around the joint concave bottom, thus preventing the main body and the neck back side from dirtiness caused by excessive adhesive overflow.

粘合剂堤槽（31）形成在接合凹底部的周边，以防止用粘合剂连接时过量粘合剂溢出弄脏主体及琴颈的背面。