One of the first steps in the design of any product is to select the material from which each part is to be made.
任何产品在设计时第一步就是选择产品每个部分的构成材料。
The plastic noumenon includes a voluble part, each of two ends of the voluble part is provided with a integrated stop part, the conducting material is wound around the voluble part.
所述塑料本体包括一缠绕部分，该缠绕部分的两端分别一体设有一限位部分，导电材料缠绕在缠绕部分上。
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