MHB ?? ????-?????????? Pb-Ca-Sn-Al ???? ????? ???????, ????? ???????, ?????????? ??? ????? ???? ?????????????? ?????. ???????????, ????????? ??? ??????????? ???? ??????.

?? ?? ?? ??????? ???????, ??????? ???? ??? ???? ?????? ????????? ?????? ????. ???? ??? ???? ??? ??.? ???-??, ??? ????? ?????? ???????? ?????????? ??? ????????? ????? ??? ???????????? ????????? ???????? ???????? ???????? ????.

???? ??????? ?????:
???? ????? ?? ??????? ??????? ????????? ???? ?????? ???????? ??????????, ??? ?????????????, ????????? ??????????, ???? ?????????? ??? ???????? ?????????? ???????? ???????? ??????? ????????? ?????? ?????? ??????? ???. ???? ????????? ?????? ???????????? ??? ??? ???? ?????????? ?????? ?????.