The contactrelationship between Silurian and Devonian is parallel unconformity.
泥盆系与志留系之间为平行不整合接触。
2
We have built a long-term contactrelationship with more than 5000 customers. Thousands of clients have contacted with us.
其中已与5000多个用户建立了中长期合作关系,联络客户数量达到上万个。
3
A great amount of statistic work has revealed the mode of occurrence of the gold, its fineness, grain-size, forms and contactrelationship with other minerals.