amazonbasics slim carry on travel backpack overnight Amazon Basics Backpack,Carry-On with Laptop Compartment, 1.55 cu. ft. Capacity,Expandable for 10% Extra Space,Convertible & Shoulder Bag,Multiple Pockets,13.8"W x 21.5"H x 9.5"D, Black pfid:1284_ Mini Backpack Purse for Model:DSK30-B/F702M

amazonbasics slim carry on travel backpack overnight Amazon Basics Backpack,Carry-On with Laptop Compartment, 1.55 cu. ft. Capacity,Expandable for 10% Extra Space,Convertible & Shoulder Bag,Multiple Pockets,13.8"W x 21.5"H x 9.5"D, Black pfid:1284_ Mini Backpack Purse for Model:DSK30-B/F702M

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pfid:1284_

Model:DSK30-B/F702M

However, due to the one-dimensional linear characteristics of the tubular structure, the liquid flow is directionally constrained, leading to a significant decline in energy conversion efficiency under multidirectional or nonlinear excitations