up:
  - "[[中国图书馆分类法 Collection]]"
ctime: 2025-03-01T23:22:19+08:00
english: Mathematical science and chemistry
aliases:
  - O - Mathematical science and chemistry
  - Mathematical science and chemistry
  - 数理科学和化学
down:
  - "[[O1 数学]]"
  - "[[O3 力学]]"
  - "[[O4 物理学]]"
  - "[[O6 化学]]"
  - "[[O7 晶体学]]"
mtime: 2025-09-09T12:37:16+08:00