| 摘要 |
A product administering device having a barrel with an interior of smooth regular cylindrical shape along its length , open at both ends, and nipple attachable to one end of the barrel, a cheek plate at the one end of the barrel, a plunger having a flexible head insertable into the barrel from its other end, finger plates attached to the barrel, and a plunger stem of planar synthetic material connected to the plunger head, the edges of the planar material fitting within the barrel to act as a guide for movement of the plunger into and out of the barrel. |
