Support system for old trees comprises upper and lower rings made from steel strip which are connected by steel tubes with threaded rods welded on their ends which fit into mountings on insides of rings

摘要

The support system for old trees comprises upper and lower rings (1) made from steel strip. These are connected by steel tubes (8) with threaded rods (7) welded on their ends which fit into mountings (9) on the insides of the rings.