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ст. ASTM E96-E96M-16
A suitable weighing cover consists of a circular disk
of aluminum 1⁄32 to 3⁄32 in. [0.8 to 2.4 mm] in thickness
provided with a suitable knob in the center for lifting. The
cover fits over the test specimen when assembled and makes
contact with the inside beveled surface of the wax seal at, or
just above, the plane of the specimen. The cover is free of sharp
edges that might remove the wax and is numbered or otherwise
identified to facilitate its exclusive use with the same dish.