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US6000600A Method for welding with a vacuum 失效
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Method for welding with a vacuum
摘要:
An exemplary method for welding a circular disk coaxially atop a tubular body comprises the steps of rotating the body and disk thereon, drawing a vacuum inside the body for vacuum holding the disk thereon, and welding the disk along a rim thereof to the body to sealingly join the disk thereto.
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