| 申请人 |
KUMAGAI GUMI CO LTD;YOOKON KK;NIPPON HUME PIPE CO LTD;RAILWAY TECHNICAL RES INST;MITSUI CONSTR CO LTD |
发明人 |
MASUZAWA SHACHIO;HISHINUMA NOBORU;SAKA HIDEMASA;HAYASHI TAKAHIRO;TSUDA KAZUYOSHI;MURATA OSAMU;FUKUSHIMA HIROFUMI;ITO TATSUO;TAKEOKA KIYOMITSU |
