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1.This area was in an arc and rear-arc basin on convergent plates in the Middle Devonian.
其岩石化学及地球化学显示岛弧火山岩特征。收藏指正
2.The optimum design method is utilized to design 12-5-48HB double-horse head beam pumping unit with rear horse head ′s outline of spiral of Archimedes, and the optimum result is analyzed and compared with double-horse head beam pumping unit with rear horse head ′s outline of three-section circular arc and beam pumping unit.
用该优化方法对12-5-48HB型后驴头为阿基米德螺线双驴头抽油机进行了优化设计，并对优化结果和后驴头为三段圆弧的双驴头抽油机及游梁式抽油机进行对比分析。收藏指正
3.Results ①The external aperture of VA lay in the rear of the petrous temporal bone, similar in shape to an arc of 59.68%. Its average measurement was (8.47±3.42) mm in length and (0.86±0.36) mm in width.
结果　①VA外口位于颞骨岩部后面的中份 ,外形多呈弧形 (5 9 6 8% ) ,平均长度和宽度分别为 (8 4 7± 3 4 2 )mm、(0 86± 0 36 )mm ;收藏指正
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