花岗石平台表面的平面度要求高，也有部分沟槽、侧面及定位孔的加工等；
The surfaces of granite plates require high flatness, and some granite plates need the manufacture of ditchs, sides and locating bores.
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。
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。
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.
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