The purpose of this research were to investigate the influence of palm fiber composition and the number of hole cavities was varied with design Acoustic Sandwich Composite on sound absorption of acoustic panel. Acoustic panel were made of palm fiber as core and foam concreate as skin upper layer and bottom layer where there is a hole cavity on skin upper layer. Composition and the num... https://megkiqjo6gdjo3.theisblog.com/35130346/diare-disebabkan-infeksi-escherichia-coli-pada-anjing