Most modern arc furnaces are of the directarc type.
大多数现代电弧炉都是直接电弧式的。
2
We have found boninites in the Deji ophiolite section in this study, thereby providing direct evidence for their fore arc setting.
作者在研究得几蛇绿岩剖面时发现存在玻安岩，从而为日喀则蛇绿岩具有弧前背景提供了直接证据。
3
The solution of arc length of sectional ellipse for geodetic problem, which is based on the direct algorithm of meridian arc length is introduced in this paper.