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仪表用金属带材弹性 性能试验方法
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精密合金包装、标志和质量证明书的一般规定
General rules for packing marking and certification of precision alloys
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铁铬玻封合金4J28技术条件
Glass sealed iron-chromium alloy 4J28 technical requirement
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无磁磁尺基体用铁锰合金4J59技术条件
Iron-manganese alloy 4J59 for non-magnetic ruler technical requirement
价格：￥0.00
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线纹尺合金4J58技术条件
4J58 alloy for line rules technical requirement
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铁镍铜玻封合金4J41技术条件
Glass sealed iron-niclel-copper alloy 4J41 technical requirement
价格：￥0.00
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