water vapour (WV)是什么意思

用法例句

The effects of w_V/w_C on high-temperature wear property of Cr-Mo-V cast hot-forging die steel were studied.

研究了不同wV/wC对Cr-Mo-V精铸热锻模具钢的高温磨损性能的影响,并探讨了其磨损机理。