A pickle line assembly is provided having a roll tank, a pickle tank, and an expansion seal. This refined-coal production method is provided with: a step in which a mixture including moisture-containing coal and oil is heated to dehydrate the coal; a step in which droplets accompanying steam generated by performing dehydration are removed; and a step in which steam, having had the droplets removed therefrom, is compressed to obtain high-temperature steam. The latitude and longitude that define the point for an inbound turn can be displayed as a bearing, andor as a distance along a radial. The core strand has a first wave form and each filament of the outer strands has a second wave form such that the first wave form is substantially different from the second wave form.