| 摘要 |
A stationary unit to diagnose a teat cup liner comprises a spout, a body, an electric lamp switch, an artificial teat, a chamber of elastic material, a perforated pipe, an extending hollow, a hollow of an elastic membrane, in which the pipe and movable resilient plates are disposed, a vacuum-meter and a current source, a valve to switch off a vacuum source, a servo-type light system. |
