Table or frame has legs made up of telescopic tubes, its height being adjusted using coarse adjustment of upper tube and fine adjustment in which it works against spring mounted in lower tube

摘要

The table or frame has legs made up of telescopic tubes. Its height can be adjusted in two stages; a coarse adjustment (8) of the upper tube and a fine adjustment (9) in which it works against a spring (3) mounted in the lower tube or on a rod mounted at its top.