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56-61. Identification of The Presence of Water in The Production Fluid Distribution Process in the Offshore Oil Field. Hariyadi Hariyadi, Dedy Kristanto, Yulius Deddy Hermawan. PDF (Bahasa Indonesia) 62-67. Preparation and Characterization of sPEEK-PVA Composite Membranes with Graphene Oxide as filler for Direct Methanol Fuel Cells.