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MOVABLE CONTACT: Beryllium copper alloy, gold over nickel plate.
游动联系人：铍铜合金，镀镍板。
youdao
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MOVABLE CONTACT: Copper alloy, gold plate over nickel plate.
游动联系人：铜合金，镀金镍板。
youdao
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MOVABLE CONTACT: Copper alloy, gold plate over nickel plate.
游动联系人：铜合金，镀金镍板。
youdao