二叠／三叠系界线层
Permian-Triassic boundary beds
二叠─三叠系界线
permian-triassic boundary
二叠－三叠系界线
permian-triassic boundary
P-T boundary
二叠—三叠系界线
permian-triassic boundary
二叠系－三叠系界线
permian-triassic boundary
二叠系—三叠系界线
Permo—Triassic boundary
permian-triassic boundary
陆相二叠系－三叠系界线
Terrestrial Permian-Triassic boundary TPTB
陆相二叠系—三叠系界线
circular plate type elastomeric pad bearings
石炭－二叠系界线
Carboniferous-Permian boundary
侏罗系与三叠系界线
the boundary between the Triassic and the Jurassic
二叠／三叠纪界线
permian-triassic boundary
二叠—三叠过渡层
the Permian-Triassic transitional bed
二叠－三叠纪
permian-triassic
Permian to Triassic Period
石炭系—二叠系
Permian-Carboniferous period
carboniferous-permian
permian-carboniferous