| 摘要 |
<p>A head band has two ball and socket joints spaced apart by a distance approximately equal to the human interocular distance, said joints including balls each of which is bored non-circularly to receive a retaining rod arranged to be passed selectively through and axially adjustable in the bore in one of said balls, said retaining rod being provided with a clamping device at its free end for receiving and clamping an endoscope.</p> |
