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(Piston ring) Yizheng Shuanghuan another technology was awarded the national invention patent
14
2016
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09
(Piston ring) in July 2016 vehicle engine industry production and marketing summary
07
(Piston ring) in June 2016 automobile engine industry production and marketing summary
(Piston ring) Yizheng Shuanghuan century boutique four matching product line promotion (Gaochun Station)
31
08