Automated bollards can be raised or

Automated bollards can be raised or lowered via remote control, access control or guard house. Automated retractable bollards are raised/ lowered by electric, pneumatic or hydraulic energy.
The better choice is a hydraulic retractable bollard because of its advantages above the electric and pneumatic bollards. The distance between these bollards should not be more than 5Ft (1525mm) whereas pedestrians (in wheelchairs) have no problem passing through, whilst it will still form a barrier for motorized vehicles.

結果 (中文) 1:

自动护柱可以提高或降低通过远程控制，访问控制或警卫的房子。自动收放式标柱是提高/降低电动、 气动或液压能源。更好的选择是液压伸缩柱式以上电动和气动护柱其优点。这些护柱之间的距离不应超过 5 英尺 （1525 毫米） 而 （在轮椅） 行人有穿境而过，虽然它仍然会形成一道屏障为机动车辆没问题。

結果 (中文) 2:

自动升降柱可以提高或通过远程控制，访问控制或警卫室降低。自动伸缩护柱被升高/由电动，气动或液压能降低。
更好的选择是因为它的优点上面的电动和气动升降柱液压伸缩式系船柱。这些护柱之间的距离不应超过5英尺（1525毫米）更多，而行人（在轮椅）都没有问题穿过，而它仍将形成用于机动车辆的屏障。