| 摘要 |
Joints to be utilized in the construction of modular greenhouses, which consist of three different types: frontal greenhouse joints I, angular joints 15, and lateral joints 21. The joints bear semi-cylindrical sockets as in 2 and 4 and others which form with the second plate of each joint a cylindrical socket into which column 10 and horizontal rafters 9 and angular rafters 8 are assembled, using speedily operating rivets II. |
