What is the kind of Dan Geer ancient city?

丹葛尔是怎样的一座古城？

If our air forces are never used, they have achieved their finest goal. — r. Van De Geer.

如果我们的空军永远也派不上用场，那他们就最好地完成了任务。

The specific structure and dimensions of steering geer are designed with the essential part drawing.

设计了转向器的具体结构尺寸，绘制了必要的零件图。

He is also an earthquake expert with an organization called Geotechnical Extreme Events Reconnaissance, or GEER.

他同时也是一个叫做GEER的组织的一名地震专家。

The Paper has made an approach to the problem in the study of theory of oil starvation calculation on geer till now.

本文针对当前在齿轮缺油计算理论研究中存在的问题进行了探讨。