On the assumption of bi-directional and unilateral strain, dynamic failure strain of two submarine representative structures were measured according to the volumeequivalent principle.
利用体积等效原理，得到了潜艇的两种典型结构在双向应变假设和单向应变假设下的动态开裂应变。
2
There are currently about 26m containers in the world, and the volume of goods they carry has risen from 13.5m "twenty-foot equivalent units" in 1980 to almost 140m today.
In other words, while these arrays have the thickness of a conventional crystalline solar cell, their volume is equivalent to that of a two-micron-thick film.