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professional car detailing pressure washer

2025-08-15 04:53
2025-08-15 03:56
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    Mandrel –A mandrel is one of the two primary methods for manufacturing coil springs. This process can be carried out using a lathe, winding machine, or hand crank machine. During production, a guide mechanism ensures that the wire is aligned correctly to achieve the desired pitch, which is the spacing between the coils as they are wrapped.