氢h meaning in English

hydrogen

In order to approach above target , we applied a vuv filter on the pre - filter wheel with high transmission in solar ha line . the solar vuv radiation reaches detectors through the filter . then the solar ha images are obtained by each telescope
在eut的前端和消杂光滤光片组中，安装一个氢h线( 121 . 6nm )滤光片，使太阳121 . 6nm强辐射进入eut中，实现eut的四个望远镜在同一波段对日成像。