| 一般 |
cranmobile; truck-mounted crane (There are four principal types of mobile cranes: truck mounted, rough-terrain, crawler, and floating. The most basic truck-mounted crane configuration is a "boom truck", which features a rear-mounted rotating telescopic-boom crane mounted on a commercial truck chassis.
Larger, heavier duty, purpose-built "truck-mounted" cranes are constructed in two parts: the carrier, often called the lower, and the lifting component, which includes the boom, called the upper. These are mated together through a turntable, allowing the upper to swing from side to side. • A Grove truck-mounted crane in road travel configuration  wikipedia.org Alexander Demidov) |
