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Import granite platform 进口花岗石平台
A granite platform (Granite Flat Panel) was a long-term natural aging, organizational structure, uniform, linear expansion coefficient is extremely small, internal stress disappear, not deformed.
花岗石平台（花岗石平板）经长期天然时效，组织结构均匀，线胀系数极小，内应力完全消失，不变形。
Paved with granite surface of the platform and steps, such as glass plate like formation.
用花岗石铺成的月台地面和台阶，像玻璃板一样平整。
China's Archeozoic Terrane, mainly a granite-greenstone belt, a small part of which been metamorphosed at a high grade, is basically located in North China Platform distributive area.
中国太古宙地体基本上分布在华北地台范围内，主要为花岗岩绿岩带。少部分为高级变质带。
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