A dust shroud for use with a vacuum source and an abrading machine having a rotating abrading wheel includes a dust shroud housing adapted to be connected to the vacuum source and mounted to the abrading machine. , in particular with a view to sterilising said hollow bodies, and is equally suitable for various discharge types such as dielectric barrier discharge and discharges with high frequency and microwave excitation. The rigid plate presents lateral guide ribbings, suitable for facilitating insertion of the male part of the buckle in the sheath. The table top comprises a frame having sides, an underlay and a transparent cover. The sintered bearing metal layer is designed in at least one layer region as a gradient layer. As a result, the energy industry business can achieve the clarity, consistency, and well-defined execution of core processes that reduce inefficiencies and waste that result from unnecessary process complexity and exceptions.