| 摘要 |
An apparatus for warning a breeder that one of his animals is about to give birth has a harness which mounts an electrical resistance sweat detector and a transmitter responsive thereto on the neck of the expectant animal; detection of an increase in sweating which precedes parturition is accompanied by the transmission of a pulse coded radio signal which is picked up by a remote receiver tuned to respond just to that coded signal, and the receiver then activates a visual or audible warning to alert the breeder to the approach of parturition.
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