≈ 20%
≈ 10%
≈ 70%

  • 20%

  • 1 : 1

  • SiO₂

  1. 01

  2. 02

  3. 03

  4. 04

  5. 05

41°55′ N, 22°25′ E

41°55′ N, 22°25′ E