A special device of a crane for operating with containers.
用于操作容器罐的特殊起重机。
High school, college or industry courses in crane operating are usually required.
或者通常需要高中，大学或行业起重机操作课程。
The bolt of tower crane was suddenly fractured after operating for one year.
某塔吊服役仅一年，塔吊螺栓就发生突然断裂。
The bolt of tower crane was suddenly fractured after operating for one year.
某塔吊服役仅一年，塔吊螺栓就发生突然断裂。
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