| 摘要 |
The display system comprises four arms (13,16) which are pivotable through 90 deg. in both directions in a common plance, and are cylindrical. A stop (19) for contact with pipe ends, prevents the arms being pivoted beyond 90 deg. Each arm (13-16) at its end has a recess (20) with two tongues (21,22). These tongues have heel formations (23,24) which snap-engage holes in pipe ends. The whole assembly is made of plastics material. |
