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管子外徑640,內徑460,長3400,內孔能否鍛造出來?---[請教] |
Re: 管子外徑640,內徑460,長3400,內孔能否鍛造出來?---[請教]
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Re: 管子外徑640,內徑460,長3400,內孔能否鍛造出來?---[請教]
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