a lead-free hard solder material is a kind of lead-free alloy.
无铅钎料,它涉及一种合金,特别是一种无铅的钎焊合金。
As the increasing demand for high-density and environmental protection, the traditional lead solder process is hard to meet these needs.
随着微电子产业对高密度封装和环保的要求与日剧增,传统的铅锡焊工艺越来越不能满足需要。
in some cases it may be necessary to connect metal surfaces by means of a hard spelter solder which fuses at hight temperature.
某些情况下有必要用一种高熔融温度的强锌焊料来连接金属表面。
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