薄壁部分可能呈现厚壁部分和厚壁部分可分为相互接触的。
The thin wall portions may be rendered thick wall portions and the thick wall portions may be brought into mutual contact.
有些决定，如壁厚和销轴直径，可能取决于科学的计算，但非科学的部分的设计仍然是首要的。
Some decisions, such as wall thickness and pin diameter, may depend on scientific calculations, but the nonscientific component of design remains primary.
包装也会产生厚壁凹痕对部分表面。
Also packing of thick sections can produce sink marks on the part surface.
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