During solidification of hollow ingot, its solidification and quality are seriously affected by the heat transfer boundary conditions between inner sleeve of core and cooling medium.
在空心钢锭凝固过程中，芯子内套筒与冷却介质之间的换热条件对空心钢锭的凝固过程及质量有着重要的影响。
It is important for the beginner to note that the core pin extend completely through the sleeve, and is attached to the back plate.
对于初学者来说重要的是注意型芯延伸完全穿过顶管，并且安装在底板上。
A valve core is coupled to a portion of the sleeve, opposite to the flange portion.
阀门的核心是耦合的袖子，对面法兰部分的一部分。
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