| 摘要 |
<p>The present invention relates to a telescopic measurement instrument provided with a protective device for protecting the ground bearing ends thereof, which comprises an impermeable cap, which can be tightly connected to the ground bearing end portion of a telescopic measurement instrument, the cap longitudinally extending for at least a length corresponding to the region interested by the holes and opening provided on the outer walls of the measurement instrument. <IMAGE></p> |
