itjetk 发表于 2019-11-22 09:16:16

ASTM B617-98(2016)

ASTM B617-98(2016) Standard Specification for Coin Silver Electrical Contact Alloy


shukesan 发表于 2019-11-22 09:16:17

ASTM B477,539,541,542,576,596,615,617,628,667,693,742,854,878Electrical Contact
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