n.系船柱；护柱
Pass the head line round the bollard and make fast. 首缆上桩挽牢。
Symbol for outdoor lighting. Standard or bollard can be specified. 户外照明符号。可指定标准式或柱式。
Drag onto the page to add a bollard for blocking vehicle access. 拖到绘图页后，可以添加阻止机动车通行的安全岛护柱。
An upper end of a timber that projects above a deck and is used as a bollard. 肋骨端头伸出甲板用作系柱的一块木料的上端
Drag onto the page, then right-click to specify standard or bollard. 拖到绘图页上，然后右击可指定标准式或柱式。
