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polymethylene 【化學】聚甲撐,多亞甲基。

polymorph

Occupational exposure limit for polymethylene polyphenyl isocyanate in the air of workplace 車間空氣中多次甲基多苯基多異氰酸酯職業接觸限值

Mdi testing methods for polymethylene polyphenyl polyisocyanate testing methods for polymeric mdi 聚甲烯聚苯聚異氰鹽酸的測試方法