Title:
【考案の名称】地下工事用ピツトのカバ-装置
Document Type and Number:
Japanese Patent JPS5989143
Kind Code:
U
Inventors:
Abe Yasuo
Tsuneo Nishioka
Tsuneo Nishioka
Application Number:
JP18118982U
Publication Date:
June 16, 1984
Filing Date:
November 30, 1982
Export Citation:
International Classes:
E02B9/06; B66D3/02; E02D17/00; E02F5/10; F16L1/038; (IPC1-7): E02D17/00; B66D3/02
Domestic Patent References:
| JPS53744A | 1978-01-06 |
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