"copper" nach Englisch mit Beispielen - Kollokationen-Wörterbuch Englisch
- The latter describes a break along a rough, jagged surface; an example of this property is found in native copper.
- Chalcopyrite is rarely found in association with native copper.
- It was probably what is called native copper, which is sometimes found in large lumps on the ground.
- Arizona used native copper from 1932 to 1934.
- In fact, native copper is no longer as easy to find in that state these days.
- Stage C: In the first two steps, the mineral used was native copper that does not actually need specialized technology.
- Probably, due to the situation that native copper was increasingly difficult to find, copper ore is used in this third step.
- The main ore exploited in those times was native copper from the oxidation zone of the deposit.
- The miners sometimes found masses of native copper up to hundreds of tons.
- The ore also contained native copper, usually as individual grains but often as sheets several feet long.
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