TY  - BOOK
AU  - Pervaiz Habibullah
TI  - Miracle of imposing vacuum (depresion) on sand moulds
SN  - 9789698674113
U1  - G 621.55 
PY  - 2012///
CY  - Lahore,Pakistan
PB  - Salman Art Press
KW  - Vacuum
ER  -