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29
2017-12
Reasonable calculation of die size
Calculation of die hole size, chemical composition, main product is extruded alloy...
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29
2017-12
The research and development of the copper tube in China has made a breakthrough
The research and development of the copper tube in China has made a breakthrough,...
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29
2017-12
A big plan for "8" in the purple copper pipe industry market
In the past more than 10 days, the central leadership has conducted research in...
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