... stylus 尖笔，钢针，记录针，笔尖，笔头 styrene base resin 苯乙烯基树脂 styrene-dielectic cable 苯乙烯绝缘电缆 ...
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First, More than 10 resins from the major resin plants around China were tested, as a result, a kind of weak-base anion styrene resin with larger pores was chosen.
本项目首先通过对国内各主要树脂生产厂的10 多种树脂的考察，优选和改进了一种大孔弱碱性苯乙烯系阴离子交换树脂。
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