hydrogenizev.使与氢化合
hydrogenn.氢
hydrogenation reactor氢化反应器
hydrogenous moderator含氢减速剂
hydrogenating reactor加氢反应器
hydrogenating process加氢
hydrogen-containing含氢的
hydrogen bell furnace全氢罩式炉
hydrogen ion exponent氢离子指数,氢指数
hydrogen fermentation生物制氢
Hydrogen pelysiloxane含氢硅油
hydrogen sealing bush氢气密封瓦