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????? ????? ?????? ????? ????? ??? ???? ???? ???????? ?????????? ?????? ?????? ??????? ??? ?? ???? ???? ?????? ????? ??? ?? ???? ?????? ????? ???????? ?? ????? ??????. ???? ?????? ??????? ????????? ?? ?????? ???? ?????? ?????? ??? 90 ??? 450 °?. ^[2]

?????? ????? ?????? ???? ????? ??????? ???????? ??? ????? ???? . ???? ?????? ?????? ??? ?????? ????? ?? ?????? ??????? ?? ????? ???? ????? ?????? ????? ??????? ????? ?????.

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^ Ogunseitan? Oladele A. (2007). "Public health and environmental benefits of adopting lead-free solders" . Journal of The Minerals, Metals & Materials Society . ?. 59 ?. 7: 12?17. DOI : 10.1007/s11837-007-0082-8 . ????? ?? ????? ?? 2018-12-22.
^ Frank Oberg, Franklin D. Jones, Holbrook L.Horton, Henry H. Ryffel (ed) Machinery's Handbook 23rd Edition Industrial Press Inc., 1988, ( ???? 0-8311-1200-X ), page 1203

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[lead-free-benefits-1] Ogunseitan? Oladele A. (2007). "Public health and environmental benefits of adopting lead-free solders" . Journal of The Minerals, Metals & Materials Society . ?. 59 ?. 7: 12?17. DOI : 10.1007/s11837-007-0082-8 . ????? ?? ????? ?? 2018-12-22.

[2] Frank Oberg, Franklin D. Jones, Holbrook L.Horton, Henry H. Ryffel (ed) Machinery's Handbook 23rd Edition Industrial Press Inc., 1988, ( ???? 0-8311-1200-X ), page 1203

[1]

[2]