超深永久基坑
over-deep permanent foundation pit
地面永久变形
ground permanent deformation
沥青路面永久变形
permanent deformation of asphalt pavement
准永久形变
quasipermanent deformation
作用准永久值
quasi permanent value of an action
（浮动基准面）
both spiritual and formal resemblance iconicity
波动方程基准面校正
wave equation datum correction
Wave-equation-datuming WED