The pull head and the pull ring on the zipper move to the closing end of the zipper; the iron sounder can separate from the magnetic body, and makes the sound to remind people to close the zipper;
拉链上的拉头及拉环一向其闭合端移动，铁质发声器就会脱离磁性体而发出 响声，提醒人们关闭好拉链；
Back zipper closure with nylon pull.
回到拉链尼龙拉。
Back zipper closure with nylon pull.
回到拉链尼龙拉。
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