【建筑】起重臂(直重机吊杆)【生活】悬臂(起重机吊杆)

concealed door (jib door)

jib crane adapted for attachment to standard vehicles

jib

spreader boom (spreader jib) open-pit mining

jib

mobile crane with box section jib【机】

boom【机】;luffing jib【机】

wall creeper type jib crane