TY  - BOOK
AU  - Sugiyama, Genroku
AU  - 
TI  - Valve apparatus and hydraulic drive system
U1  - 195  D 
PY  - 2700///4-1996
CY  - Calcutta
PB  - Patent Office Calcutta
KW  - Valve device-Hydraulic drive system
KW  - Indian patent
KW  - PT176332
N1  -  Acc noPT637, Applicant-Hitachi construction machinery co.Ltd,Japan
ER  -