| 摘要 |
A retractably extendable barrier with a lazy tongs barrier body (2, 30), transport means (10, 43) and actuating means (7) to facilitate extension and retraction. In some embodiments the barrier is portable, having wheeled transport units (3). In others it is mounted to a mounting structure (31) in which case the barrier body (30) can have adjustment means to tilt and align the barrier body or guide means (37) to provide lateral stability. |
