Zip from a pencil case being opened and closed at several speeds. Grinding noise. Zipper.wav 聲道:2 類型:wav speeds、zipper、several、close、teeth、Zipping、slow、fast、smooth、clothing、unzipping、zip、OWI、unzip、open 速度、拉鍊、一些、關、牙、荏苒、慢、快速、光滑、服裝、解壓、壓縮、OWI、拉開拉鍊、打開 資料來源:freesound ( https://freesound.org )