DIN 21920-1:1988-11 Mine plans; petrography; generally applicable symbols; sediments

标准编号：DIN 21920-1:1988-11

英文标题：Mine plans; petrography; generally applicable symbols; sediments

德文标题：Bergmännisches Rißwerk; Petrographie; Allgemeingültige Zeichen; Sedimente

发布日期：1988-11

标准预览图