| 摘要 |
A telescopic adjustable support has telescopic arm members, with first and second axially spaced clamp parts in the larger arm member, one adjacent the outer end thereof and the other spaced inwardly therefrom. The outer clamp part has an arm member receiving spaces with upwardly facing wedge surfaces, and the inner clamp part having an arm member receiving space with downwardly facing wedge surfaces. An inner arm member passes through said clamp parts, and is locked when it is not in substantial alignment with said first arm member.
|
