A system for monitoring the parameters representative of operating conditions of an oil film bearing, wherein an oil film is arranged between a static component and at least one rotating component defining an axis, said at least one rotating component being arranged inside said static component, the system comprising at least one pressure sensor to detect the oil pressure of said oil film; at least one distance sensor to detect the thickness of said oil film; at least one temperature sensor to detect the temperature of said oil film;
wherein the at least one pressure sensor, the at least one distance sensor, and the at least one temperature sensor are housed in said at least one rotating component.

A manufacturing method of a cold-rolled steel sheet in which the method uses a full-width heating device that heats a steel sheet over an entire area in a width direction of the steel sheet, an edge heating device that heats end portions in the width direction of the steel sheet, and a cold rolling mill that rolls the steel sheet and that is arranged on a downstream side in a rolling direction with respect to the full-width heating device and the edge heating device, the method includes: heating the steel sheet by using the full-width heating device and the edge heating device in such a manner that temperatures of the end portions in the width direction becomes higher than a temperature of a central portion in the width direction of the steel sheet on an entry side of the cold rolling mill.