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JX151Material: 15 nickel lead white copper -
JX180Material: 18 nickel lead-free white copper
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JX172Material: 18 nickel lead-free white copper
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JX110Material: 15 nickel lead white copper
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JX111Material: 15 nickel lead white copper
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JX122Material: 18 nickel lead-free white copper, 15 nickel lead white copper