hecla

hecla

1. After buying the operations of US-based Hecla and South Africa's Gold Fields in 2008, Rusoro is the only international company ex-tracting gold in Venezuela.

2008年收购总部位于美国的Hecla和南非GoldFields的业务后，RusoroMining成为在委内瑞拉开采黄金的唯一一家跨国公司。

2. A new kind of cylindrical lens array (CLA), named as hybrid element cylindrical lens array (HECLA), which composed of a few whole elements and two half elements, is proposed in this paper.

提出了结构新颖的混合单元柱面透镜列阵 (HECL A)系统 ,在该系统中引入了半单元结构。

3. THE FOLDING CHARACTERISTICS AND TECTONIC EVOLUTION OF HECLA HOEK SEQUENCE OF WEDEL JARLSBERG LAND, SPITSBERGEN

斯匹茨卑尔根群岛韦特尔茄尔斯冰山地区海克拉霍克岩系褶皱特征与构造演化