parts

In science and engineering, the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction. Since these fractions are quantity-per-quantity measures, they are pure numbers with no associated units of measurement. Commonly used are parts-per-million (ppm, 10−6), parts-per-billion (ppb, 10−9), parts-per-trillion (ppt, 10−12) and parts-per-quadrillion (ppq, 10−15). This notation is not part of the International System of Units (SI) system and its meaning is ambiguous.

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  1. KRUPP

    Misc. Older Warn MX8000 D1 Winch

    Picked up this old winch from the boneyard the other day. Never knew it was there. It has been sitting under a pile of other parts for probably 25 years. Needs a full restoration. Missing one of the tie-rods too. Question is, is it worth restoring? I don't believe Warn makes these anymore...
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