compression: a mattress pad in the horizontal surface of the force applied vertically downward, causing the mattress by the force along the direction of surface displacement.
压缩量:在水平放置的床垫垫面上施加垂直向下的力,引起床垫表面沿受力方向的位移量。
we asked if there was another room or mattress or even a foam mattress pad available, but were told no.