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1.发明授权Shield segment for covering the inner wall of the tunnel made of composite shell units 失效用于覆盖由复合壳单元制成的隧道内壁的屏蔽段
公开(公告)号：US3415063A
公开(公告)日：1968-12-10
申请号：US47777365
申请日：1965-08-06
Applicant: ISHIKAWAJIMA HARIMA HEAVY IND
Inventor： YOSHIO AKITA , TOKIO FUJII , MASAO SASAGAWA
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