According to the study, the contact region between the twist-roller and the shaft is an ellipse. 研究表明，扭轮和传动轴接触区形状为一椭圆。
Calcite deposits mainly occur in the carbonatite area and the meta morphosed contact zone around the intrusive rocks. 方解石矿床一般产于碳酸盐岩地区和侵入岩变质接触带，受断裂风化淋滤容矿，热液接触变质作用，由碳酸盐岩褪色重结晶而形成。
The minerals are disseminated in the schist and hornfelsed schist near the dolerite contact. 这些矿物也浸染在靠近粗玄岩接触带的片岩和角岩片岩中。
