???? ????? ?????? Astm A335/P5 ??????? ?? ??????? ??????? ????????
???? ???? ??????????? ??? ??????? ???????? ???????? ?????? ?????? ASTM A335/P5? ??? ??? ?? ?????? ??????? ???????? ??????? ??? ????????? ??????? ????? ?? ??????? ??? ????? ??????? ???????? ??? ????? ?????? ???????? ?????? ??????????????. ????? ?????? ASTM A335/P5 ????? ???? ?? ?????? ??????? ??????? ??????? ??? ???? ????? ?????? ??????? ???????. ????? ??? ???????? ????? ??????? ASTM? ??? ???? ???? ?????? ??????. ????? ?????? ASTM A335/P5 ???? ?????? ???? ??????????? ??? ??????? ???????? ???????? ?????? ?????? ?????? ?????? ???????? ??????? ????????. ????? ???? ????? ??? ?????? ?????? ??????? ?? ?????? ????? ??????? ?? ?? ????? ??? ?? ????? ????? ?????? ??? ?????? ASTM A335/P5 ????? ???? ?????. ???? ???????? ??????? ???? ???????? ????? ???? ??????????? ??? ??????? ???????? ???????? ?????? ??????? ??????? ASTM A335/P5 ????? ??????. ??????? ???? ????? ????? ?? ????????? ?? ?????? ???.