Title:
【発明の名称】自動貫入試験機
Document Type and Number:
Japanese Patent JP3066287
Kind Code:
B2
Inventors:
Hirotada Sugiura
Tadao Kumanaka
Tadao Kumanaka
Application Number:
JP11224395A
Publication Date:
July 17, 2000
Filing Date:
March 31, 1995
Export Citation:
Assignee:
Nitto Seiko Co., Ltd.
International Classes:
E21B19/00; E02D1/02; E02D1/04; (IPC1-7): E02D1/02; E21B19/00
Domestic Patent References:
| JP7158370A | ||||
| JP5179881A | ||||
| JP57187415A | ||||
| JP59158822A |