| 摘要 |
<p>The system used in assembling sectional elements is characterized by the fact that the several different parts which are used may have a different shape and functions but all of them have, at their ends, profiles similar and complementary to form assembly keys. A wide number of variations with simple or double thickness is possible. The keys are cubical with four parallel rectangular section grooves, one on each side face. Through the bottom of each groove and the top and bottom faces are tapped holes. The sectional elements have projecting flanges and lips on their ends, these flanges and lips engaging around the corners of and in the grooves of the keys.</p> |
