The vessel that hath no cover, nor binding over it, shall be unclean.
一切开著口，没有盖上盖的器皿，都成了不洁的。
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In the U.S., a boat found carrying nearly 65,000 lb. (30,000 kg) of illegal shark fins won a court case because it was registered as a cargo vessel, which current U.S. finning laws do not cover.
This article puts forward to lay a cover plate in the welding of the titanium sandwich pressure vessel and it also presents the structure and welding practice of the cover plate.