GOST 23492-1983 Synthetic rubbers butadiene-styrene SKS-30ARKPN and butadiene-methylstyrene SKMS-30ARKPN Specifications《丁二烯-苯乙烯CKC-30APKПH 及丁二烯甲基苯乙烯CKMC－30APKПH合成橡胶》.pdf

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