在此期间，男式牛仔裤的拉链在正面，而女式牛仔裤的拉链在右侧。
During this period, men's jeans had the zipper down the front, whereas women's jeans had the zipper down the right side.
到60年代，男式和女式牛仔裤的拉链都在正面。
By the 1960s, both men's and women's jeans had the zipper down the front.
到60年代，男式和女式牛仔裤的拉链都在正面。
By the 1960s, both men's and women's jeans had the zipper down the front.
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