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The production has basically satisfied the needs for household fuels of a number of large and middle - sized cities such as Chengdu , Chongqing , etc. and has resulted in China 's largest vinylon production line with natural gas as its raw material - the Sichuan Vinylon Factory .
 Chengdu, Chongqing, China, the Sichuan Vinylon Factory
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Answer:
 Chengdu, Chongqing, China, the Sichuan Vinylon Factory