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GEOSTR Corporation Patents
GEOSTR Corporation
Tokyo, JP
No. of patents:

Patent Number Title Of Patent Date Issued
7004679 Easily-cuttable tunnel segment structure February 28, 2006
The present invention relates to a novel easily-cuttable tunnel segment structure used for the departure of a shield machine from a main tunnel to a branch tunnel or the return to the main tunnel from the branch tunnel, and provides an easily-cuttable tunnel segment structure 1 const

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