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用氨程序升温脱附法（TPD）研究了它们在积炭前后的酸性变化。
The acid proper-ties of its coking in front and behind by temperature programmed desorption of ammonia(TPD).
youdao
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用氨程序升温脱附法（TPD）研究了它们在积炭前后的酸性变化。
The acid proper-ties of its coking in front and behind by temperature programmed desorption of ammonia(TPD).
youdao