湍流在粘结性水底沉积物上流动时冲刷出的一种抹刀形的凹坑。
A spatulate depression scoured by a turbulent current of water flowing over cohesive bottom sediment.
一种输送机使用的输送带，其断面形状为中凹槽型、两侧上端平型、在中凹槽型内可设置挡板、花纹样突出物、点状突出物或凹坑。
The conveyer belting section for conveyer is concave groove type. Top of two sides is flat. The damper, figured project and point project or concave can be positionaled into concave groove type.
设计了一种包含柔性基底层、金属电极图案层和微凹坑阵列层的三层式蒙皮结构，提出了两种基于MEMS工艺的制作方法。
The MEMS skin composed of a flexible substrate layer, a metal electrode layer and a micro-well-array layer was designed, and two process routes based on MEMS were developed for the skin fabrication.
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