求翻译：在港口，主要用于室外的货场、料场货、散货的装卸作业。它的金属结构像门形框架，承载主梁下安装两条支脚，可以直接在地面的轨道上行走，主梁两端可以具有外伸悬臂梁。是什么意思？

In the port, the main freight yard for outdoor material cargo, bulk cargo loading and unloading operations. Its metal structure such as gate-shaped frame, the bearing is installed under the main beam two feet, walking directly in the ground track, the main beam at both ends with overhanging cantilev

At the port, mainly for use in outdoor goods, material goods, bulk cargo in the loading or unloading operations. Its metal structure as a gate-framework, the Bearer beams installed under two feet, can be directly on the ground running on the track, main frame ends can have extended outrigger.

In the harbor, mainly uses in outdoor freight yard, the materials yard goods, the bulk cargo handling operation.Its metal structure gate gap frame C, under the load bearing king post installs two stubs likely, may upward walk directly in the ground track, the king post both sides may have overhang t

In the port, mainly used for outdoor yard, yard goods, bulk cargo loading and unloading operations. Its metal structure like a door-frame bearing girders installed two feet, you can walk on the tracks directly in the ground, both ends of the main beam can have extended cantilever beam.

正在翻译，请等待...