???? ????? ???? NBR ???? ?????? ????? ????
???? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ????? ???? NBR ????? ?????? ????? ?? ??????? ?????? ???? ????? ????? ?????. ??? ????? ?????? ????? ?????? NBR ?????? ??? ???????? ???? ????? ?????? ?????????? ?????? ????? ?????? ?????? ????????? ??? ?? ????? ?????? ??????? ??? ?????? NBR? ????? ???? ???? ????? ????? ??????? ??????? ????????? ??? ?????? ?????? ??????? ????? ?? ?????????. ?? ????? ?????? ????? ?????? NBR ?????? ?????? ?? ???? ????????? ??? ???? ?????? ?????? ???????? ?????? ?????? ????? ?????? NBR ?????? ??? ?????? ?????? ??????? ??? ?????? ????????? ????????. ??? ?? ??????? ????? ???? ??????? ??????? ??? ?????? ????????? ?? ?????? ??? ?????? ?????? ?????? ?????? ??????????? ??????. ??? ???????? ??????? ???? ???????? ???? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ???? ?????? ????? ?????? NBR ???????? ??????? ???? ???????? ???? ?????? ??? ???? ?????. ???? ??? ?????? ??? ???? ?? ????????? ??? ?????? ????? ?????? NBR ??????? ???? ???????? ??????
- ???? ??????? ????????
- SAF2507con. ??????
- ???? ??????? API6D
- S320750 /s31803 ???? ?????
- ???? ????? 600 ???
- ??????????? ??? ????????
- ?????? ????? ： ????? ???????: API599 API6D ????? ????: ???? ??? ???? ?????? ANSI B16.10 API6D ????? ??????: ANSI B 16.5 ?????: WCB ?? ????? ???????? ???????: A182F6a
- ???? ????? ????? ?????
- 300 ??? ???? ????? ???????
- ???? ??????? C95800