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本文介绍一种用熔铸法制作管坯，在普通拉丝机上采用长芯杆加工管材的方法。这适用于生产新材料、数量少和规格多的贵金属毛细管。本文还研究了一些变形机理。
This article describes a method of casting tube by casting method, the use of long core rod in ordinary drawing machine pipe method. This applies to the production of new materials, fewer and more specifications of precious metal capillaries. This article also studied some deformation mechanisms.