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A kind of method making invar bar
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A kind of method of technique better simply making invar cold-heading dish circle silk material
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A kind of method of technique making simpler, lower-cost invar bar
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A kind of method making invar cold-heading dish circle silk material
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Using the resonant rod invar cold-heading silk of vacuum melting and electroslag remelting operation
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A kind of stock utilization higher resonant rod cold-heading silk
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