desulphurize例句

As cement retarder , the effect of desulphurize ashfuel oil ( DADFO ) was studied here.
研究了石油焦脱硫灰渣用作水泥缓凝剂对水泥性能的影响.

As a raw gas for carburizing, it is necessary to desulphurize in the gas sufficiently.
所以作为渗碳用原料气必须对天然气充分脱硫.