back crotch seam 后裆缝
back crotch line 落裆线
back crotch curve 后档弧线
back crotch width 后裆宽
attach back crotch stay 绱大裤底
back crotch
回来的胯部
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A convenient pant is characterized in that a run-through opening is arranged from a crotch to a front and back waist and the opening is provided with a slide fastener so as to close the opening.
一种方便裤，其特征在于：由裤裆至前后腰部设有贯通的可以敞开的开口，在开口上设有可将开口闭合的拉链。
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