其张力控制器经常发生故障，导致产品外径超标。
Its tension control system often breaks down, so the product is scrapped.
这是一种小外径的电镀线，很柔软，最初是用于真空吸尘器，但现在在许多不同产品中使用。
Jacketed wire, very flexible and initially used for vacuum cleaners but now used on many different types of products.
这种新产品可以替代现有产品，因为传统产品的外径和螺母是相同的。
The new product can replace existing products, since the outer diameters of the conventional product and the nut are the same.
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