acid-basedCOCA¹⁶⁴⁴⁴³ 基本例句 🌏酸基 A new high-range water-reducing agent AF, which is amino sulfonic acid-based, had been synthesized with sodium sulfanilate, phenol, urea and formaldehyde as the main materials in this dissertation. 本文以对氨基苯磺酸钠、苯酚、尿素与甲醛为主要原料合成氨基磺酸系高效减水剂 AF。 cnki