Document Type and Number:
Japanese Patent JPS4742084
Kind Code:
Y1
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| JPH07252992 | SHIELD EXCAVATOR |
| JPH11101090 | UNDERGROUND EXCAVATOR |
Application Number:
JP11180369U
Publication Date:
December 20, 1972
Filing Date:
November 26, 1969
Export Citation:
International Classes:
E21D9/08; E21D9/06; E21D9/10; (IPC1-7): E21D9/08; E21D9/06; E21D9/10