Abstract: The invention relates to a method for detecting and flagging a leak in roofing (2), employing a system (1) comprising i) one local detecting and communicating unit for each roofing region (Zi), comprising an elongate sensor and a module (5) for measuring and transmitting at least certain results of the measurements successively carried out, and ii) a management platform (6) configured to receive and process measurements of the modules (5) of various local units managed thereby, and to selectively trigger one or more predetermined actions depending on an evaluation of the received measurements and on an estimation as to whether or not a leak is present, each sensor (4) being installed under the waterproof membrane of the associated roofing region (Zi) and the uplink communication between each local unit and the platform (6) being achieved at least locally through a mode of wireless transmission between the module (5) of the local unit in question and either a local relay terminal, or a base station or even a c

Abstract: A refiner plate has an outer circumferential edge, a front surface having comminuting projections, and a rear surface. The refiner plate also has and a single mounting opening radially inward from the outer circumferential edge. The refiner plate also includes a radially extending key attached to the rear surface, the key having an end forming a tab that extends past the plate outer circumferential edge.