Main girder and other components of overhead traveling crane are typical welded structures, the primary failure type of which is fatigue crack.
桥式起重机主梁等构件是典型的焊接结构，其主要失效形式是疲劳断裂。
QZ type general overhead crane, grab crane for coal cinder handing, garbage handing.
QZ型-通用桥式起重机，抓斗天车，抓斗行车，抓斗起重机，煤渣抓用起重机，垃圾专用起重机。
Overhead bridge crane is a bridge in the orbit of a bridge-type crane, also known as crane.
桥式起重机是桥架在高架轨道上运行的一种桥架型起重机，又称天车。
In 1950 followed a special type of crane with a boom designed for working below overhead wires.
1950年，出现了一种特殊的带有悬臂设计的起重机，用于在高架电线下工作。
In 1950 followed a special type of crane with a boom designed for working below overhead wires.
1950年，出现了一种特殊的带有悬臂设计的起重机，用于在高架电线下工作。
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