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hydraulic jack seal kit

2025-08-16 06:55
2025-08-16 05:03
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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.