Kaewmanee, T. and Keawkasetkon , P. 2025. Factors Influencing the Purchase Decisions of The Engineering Instruments by Food and Beverage Manufacturing Companies in Bangkok and Its Vicinity: Factors Influencing the Purchase Decisions of The Engineering Instruments by Food and Beverage Manufacturing Companies in Bangkok and Its Vicinity. RATANABUTH JOURNAL. 7, 1 (Apr. 2025), 80–93.