How to ensure continuity of the PMS (Power Measurement System) housing overlap?

Good electrical continuity must be maintained between all parts of the PMS metal casing (such as the front panel, side panels, and bottom panel); otherwise, gap antennas will form, severely reducing shielding effectiveness. Methods to ensure continuity include using continuous welding instead of spot welding or screw connections. For parts that must be disassembled (such as the front panel), electromagnetic sealing gaskets (such as conductive foam or beryllium copper springs) should be used at the joint surfaces, with sufficient compression and contact pressure. All screw-connected joint surfaces should have non-conductive coatings such as paint and oxide layers removed to expose the metal, or a conductive plating (such as zinc plating) applied. Screw spacing should be sufficiently small, generally no greater than λ/20 (approximately 15mm for the highest frequency of 1GHz), typically arranged at 5-10cm intervals. In addition to gaskets, doors should be electrically connected to the casing via hinges or a dedicated grounding braid. Internal metal mounting plates, rails, etc., should also be connected to the casing via grounding screws or conductive washers. The DC resistance between any two points should be less than 2.5mΩ, as measured with a multimeter. Good overlap continuity ensures that the shielding effectiveness of the enclosure reaches the design value.