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\ xylene的例句（xylene在句子中的用法）

xylene的例句（xylene在句子中的用法）

Polyurethane demulsifier for crude oil were prepared from polypropylene glycol, xylene, toluenediiso - cyanate in xylene solvent. 用聚丙二醇和甲苯二异氰酸酯为原料, 二甲苯为溶剂合成了聚氨酯型原油破乳剂(PPG).
Ammoxidation catalyst ofm - xylene to prepare m - dicyanobenzene was studied. 研究了间二甲苯氨氧化法生产间苯二腈的工业催化剂.

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