
???? ???????
        
      ??????? ???? ?? ?? ?? ??
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              ???? ??? ????? PVC-C????? ???? ??? ??? ????? PVC-C ?? ???? PVC-C ??? ????? ????? ?????? ????? ??? ??? ?? ????? ?????? ?? ????? ??? ???? ? ??...?????? ??????
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              ???? ??? ????????Hubei Aoyuan Building Materials Co., Ltd. ????? ?? ????? ???? ??? ?? ???????? ??? ???. ?? ????? ?? ????? ????? ??????? ?...?????? ??????
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              ???? ??? ???? ??????? AD PVCAD Pipeline ????? ???? ??? ??????? PVC ?? ???? ?? ??? ?? ?? ????? ???? ??? ??????? PVC ? ???? ??? ??????? PVC ??? ??????...?????? ??????
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              ???? ??? ????? AD PVC-C?? ???? ???? ????? ???? ??? ??? ????? PVC-C ?? ?? ?? ????? ???? ??? ??? ????? ??? ????? ????? ?????? ? ???? ??? ??? ????...?????? ??????
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              ???? ??????? PVC-UHubei AD Building Materials (17399989993) ????? ?? ????? ???? ??? ????? ?? PVC-U ? ????? ???? ??? ????????? ??? GB / T12...?????? ??????
 
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               ?? ????? ?? 1 ????? 5