DIN 21557:1987-02 Mine support; yield valves for powered support; identification code

标准编号：DIN 21557:1987-02

英文标题：Mine support; yield valves for powered support; identification code

德文标题：Grubenausbau; Druckbegrenzungsventile für Schreitausbau; Kennzeichnung

发布日期：1987-02

标准预览图