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发明名称
Verfahren zum Aufrauhen von Schneedecken sowie Vorrichtung zur Durchführung desselben
摘要
申请公布号
AT300008(B)
申请公布日期
1972.07.10
申请号
AT19690003576
申请日期
1969.04.14
申请人
OTTO H. WALLINGFORD
发明人
分类号
E01H4/02;E01H5/12;(IPC1-7):A63C19/10
主分类号
E01H4/02
代理机构
代理人
主权项
地址
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