Grinding area or similar

摘要

The pumicing area comprises an enclosure (1) with one or more work sites (2). These sites comprise an infrastructure frame and a roof support and accessory equipment. The accessories can be raised by a support (6). Under each work site is a caisson (7) whose upper surface is composed of a grating (8). The caisson is connected to a suction pipe (9) of a contaminated air extraction system (10).