a framework of steel bars raised on side supports to bridge over or around something; can display railway signals above several tracks or can support a traveling crane etc.
例句
用作名词(n.)
This machine is called Bridge Gantry Crane.这种机器叫路桥门式起重机。
Single-girder gantry crane is a gantry crane.单主梁门式起重机是门式起重机的一种。
