| 摘要 |
A structural element suitable for use, as a segment of a structural unit comprising an assembly of the structural elements, in the manufacture of a release device for intraruminal administration, to a ruminant animal, of an active agent housed in' the structural unit, which structural element is of a compacted material, which material comprises a mixture of powdered iron, graphite and copper, the graphite being present in the mixture in an amount of from 2 to 7 wt%, the copper in an amount of up to 5 wt% and the iron in an amount of from 88 to 98 wt%, 'by weight of the total weight of iron, copper and graphite, and which structural element has, in at least one end face thereof a recess, adapted to receive a dosage form of the active agent, and has, passing through the structural .element, a central aperture adapted to receive a core of anodic material.
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