Supply Of Know-How / License, Bedp, Proprietary Catalyst, Proprietary Items, If Any And Other Related Services For Poly Vinyl Chloride Unit Pvc For Refinery Cum Petrochemical Complex At Ramayapatnam, Andhra Pradesh, India Project Of Bpcl Lt/C113-000-La-T-8517/1017 - Supply Of Know-How / License, Bedp, Proprietary Catalyst, Proprietary Items, If Any And Other Related Services For Poly Vinyl Chloride Unit Pvc For Refinery Cum Petrochemical Complex At Ramayapatnam, Ap India-Bpcl