refradj.难熔的n.耐火材料
refn.裁判员
refreatory belt卫燃带
Refu transducer变频器
refrining earth精制用的白土
Refcrence value正常参考值
refining saliva炼精
refaetive index折射率
refueling truck运油车
refractive inde折射率
refrigerant oil冷冻机油
refolding agent重折叠剂