No. Title Issue Date Format
1 MITSUI Enlargement Shield Tunnelling Method 1985 Black & White/5pages
2 Enlargement Of Pre-Driven Shield Tunnel Section by A New Method
June 1986 Black & White/10pages
3 Underground shield tunnel enlargement work April 1991 Black & White/7pages
       


 

 

 

 

 

 

 

 




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