Title:
【考案の名称】2段ゲ-トの騒音防止装置
Document Type and Number:
Japanese Patent JPS58172530
Kind Code:
U
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Inventors:
Niwa Nao
Application Number:
JP6958582U
Publication Date:
November 18, 1983
Filing Date:
May 11, 1982
Export Citation:
International Classes:
E02B7/52; E02B7/20; E02B8/06; (IPC1-7): E02B8/06; E02B7/20