The black button adjusts the seat back cushion.

黑色按钮是调节靠背的。

youdao

Air operated Leisure sofa Main function: 1. Air operated regulation seat back cushion Angle, 2. Motion type foot pad.

气动足浴沙发主要功能：1 .气动调节靠背角度，2 .移动式脚垫。

youdao

Has the seat back cushion function, disposes the steel system hand operated, after the fold may hide in the lathe bed.

具靠背功能，配置钢制手摇把，折叠后可隐藏于床身；

youdao

The central aisle of an airliner, the back seat of a car (stale popcorn crammed into cushion cracks), a coal mine, a hospital waiting room, a long tunnel in which a hot breeze blew first in one direction and then the other.

NEWYORKER: Ziggurat