mm.w.e是什么物理单位量?
如题
2003/2004 2004/2005
Standard deviation 905 mm w.e.1037 mm w.e.
Minimum value -2820 mm w.e.-3230 mm w.e.
Maximum value 550 mm w.e.1100 mm w.e.
Positive balances 20% 19%
这是原文