iron-free英'aɪənfr'iː美'aɪənfr'iːBNC¹²⁶⁴¹⁶⁺⁴ 基本例句 n.无铁¹⁰⁰ The paper discusses the application performance of ULF-1 low- formaldehyde iron-free finishing agent though studying on the parameters of Iron- free treatment. 通过对免烫整理工艺参数的研究,讨论了自制的 ULF1低甲醛免烫整理剂的应用性能。 cnki