| 摘要 |
<p>The trestle is constituted from two legs (1,2) connected by their upper sides by hinges (31,32,33) fixed on the leg internal faces. The opening angle of the legs is limited by two compasses (41,42) connected to uprights (13,23,11,21) opposite each leg. Each leg is constituted from a frame formed from two lower (10,20) and upper (12,22) horizontal crosspieces. An independent claim is included for a trestle manufacturing method.</p> |
