???? ??? ?????? ???? ???? ??????? ??????? ??????? Api ???????? ?????? ???????? ??????? ?????? ??

?? ???? API Bolted Bonnet ???? ????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ???? ???? ?????? ?????? ?? ???? ?????? ????????? ????????. ?? ????? ??? ?????? ????? ??????? API? ??? ???? ?????? ??????? ????? ????? ???? ?????? ??????? ??????? ?????? ????? ??????? ???????? ??????? ??? ????? ??????? ?????? ????? ?????? ????? ??????? ???????. ????? ?????? ????? ?????? ???????? ??? ?????? ?????? ??????? ??????? ???????? ???? ??????? ???? API Bolted Bonnet Valve ??? ???? ???? ?? ?????? ??? ????? ?????? ??????????????? ?????? ?????? ???????. ???? ?????? ?????? ?????? ?? ???? ??????? ????????? ??? ?? ??? ??????? ??????? ?????? ????????. ???? ????? ?????? ?????? ????? ????????? ???? ??? ?????? ??????? ????? ????? ?????? ???????? ?????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ?????? ????? ??????? ?????? ???? ???? ?????? API Bolted Bonnet Valve ?????? ????? ??? ????? ?????? ?? ?????? ???? ???????