| 摘要 |
A rumen injector having a body, an interacting piston and cylinder mounted within the body, a needle fixed to the cylinder, and wherein the cylinder is movable from a rest position to a cocked position and said piston is movable within said cylinder from a rest position to a cocked position so that in use of the injector said cylinder is first released to cause insertion of the needle and then said piston is released to cause injection of a dose into the rumen of the animal. |
