There are two kinds of twins in Berlinite: electric twin and optical twin.
磷酸铝晶体中存在两类双晶：电双晶和光双晶。
There are two kinds of twins in Berlinite:electric twin and optical twin.
磷酸铝晶体中存在两类双晶：电双晶和光双晶。
Regarding groundbased observation , the largest optical telescopes to date are the twin 10 - m keck telescopes on mauna kea of hawaii.
位于夏威夷蒙那基亚山上的却克望远镜，口径达10米，是目前世上最大的光学望远镜。
Morphology and forming mechanism of annealing twin in medium carbon steels have been studied with optical microscope.
利用光学显微镜对中碳钢退火孪晶的形态及形成机制进行了研究。
Morphology and forming mechanism of annealing twin in medium carbon steels have been studied with optical microscope.
利用光学显微镜对中碳钢退火孪晶的形态及形成机制进行了研究。
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