[Gabatarwa]: Tare da isowar buƙatun gargajiya a ƙarshen kakar wasa, kasuwar PVC ba ta da ƙarfi, ginin masana'antar PVC gabaɗaya a Shandong ya yi ƙasa kaɗan, ginin masana'antar ethylene yana da kwanciyar hankali, amma sauran masana'antar calcium carbide na waje, a ƙarƙashinsa. kudin...
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