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... In the 1980s, when they were in the honeymoon period with the West, China imported several sets from the West, and domestically developed five-axis linkage CNC machine tools. , started on this basis.
Although these imported machine tools cannot yet manufacture large propellers for submarines with a displacement of several thousand tons, it is still no problem to manufacture water jet propellers for missile speedboats with a displacement of several hundred tons.
"I heard that ...
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