outer bottom

基本解释

Fold proper air cap with bubble facing outer into the bottom of the box.
对叠好适量的气泡垫放入箱底，气泡面朝外。
A cavity between the wood inner bottom (6) and the outer bottom (9) is provided with an electromagnetic oven heating device.
在木质内底（6）与外底（9）之间的腔体中设置有电磁炉加热装置；
ip.com
A bottom cover is arranged at the bottom of the bottle body; the bottom cover comprises an inner bottom cover and an outer bottom cover which are screwed together by thread.
瓶体底部设底盖，该底盖包括可通过螺纹旋合在一起的内底盖和外底盖。
ip.com

The Second Circuit court, though, also decreed that Christian Louboutin retains the exclusive right to use the color red on the bottom of its shoes whenever the outer portion of the shoe is any color besides red.
FORBES: Both Sides Claim Victory In YSL v. Louboutin Shoe Case