Clay County

Farm machines on display are a sure sign that agriculture is still an important part of the county fair , such as the Clay County Fair in Spencer , Iowa .

作为一个明确的标志，展出农业机械说明了，农业仍然是县集市的重要组成部分，例如爱荷华州斯宾塞的克莱县集市。

Study on acid activation technology of clay in Zhidan County

志丹白土活化工艺条件试验研究

A study of the engineering property of expansive clay in Yun county . Hubei Province

湖北郧县膨胀土的工程地质研究

Study on Chicheng clay of Tang County in Hebei

河北唐县赤城土的研究

Geological Survey on Red Clay in Kedong County

克东红粘土矿地质概况及其应用

Development , Consideration and Prospect of Attapulgite Clay in Xuyi County , Jiangsu Province & Taking Development of Attapulgite Clay in Xuyi as an Example

凹凸棒石粘土开发利用现状、思考与前瞻&以江苏盱眙凹凸棒石粘土开发为例

On mineralization conditions of mingling porcelain clay deposit , yixing County

宜兴茗岭瓷土矿地质特征及成矿地质条件