详细介绍了用扩冲法对液压胀形出现凹形的护环进行修复的方法。
This article has described expanding method for repairing the concave retaining ring caused by the hydraulic bulging.
在实验室研究中，科学家们注意到，帕拉斯长舌蝙蝠擅长发现人造叶子里隐藏的半球凹形的东西。
In the lab, scientists noticed that Pallas's long-tongued bats excelled at finding hollow hemisphere shapes hidden among artificial leaves.
当水从板下的一个腔中被抽出来产生负压时，可伸缩的传感器被向下拉，形成一个凹形。
When water is pumped out of a chamber below the plate creating negative pressure, the stretchable sensors are pulled down, producing a concave shape.
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