求翻译：特性阻抗會受其材料及結構的影響，對於電線設計來說，沒有一個固定的計算公式，根據經驗所做的一個理論公式，材料不同，屏蔽不同都會有影響，每個電線公司的公式可能有所不一樣，應該都是類似的，附檔計算公式請參考，公式只能計算出一個理論值，實際還是依測試為准，以上請知悉，謝謝!是什么意思？

Characteristic impedance will be affected by the material and structure design for the wire , there is no fixed formula , based on the experience made ​​a theoretical formula , different materials, different shields will be affected , the company's formula for each wire may have

The characteristics impedance will receive the influence of its material and structure, regarding the electric wire design, does not have a fixed formula, according to a theoretical formula that the experience makes, the material will be different, shields differently will have the influence, the fo

The characteristic impedance can receive its material and the structure influence, regarding the electric wire design, does not have a fixed formula, makes a theoretical formula according to the experience, the material is different, the shield different all can have the influence, each electric wir

Characteristics impedance will by its material and the structure of effects, for wire design for, no a fixed of calculation formula, according to experience by do of a theory formula, material different, shield different will has effects, each wire company of formula may has not as, should are is si

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