One of the other pieces of equipment is the telescoping boom for the Aerial Ladder.
另一位件设备是伸缩繁荣，为空中的阶梯。
Telescoping of the boom is carried out through telescoping cylinder and steel cable, and all booms telescope simultaneously.
吊臂的伸缩是通过伸缩油缸和钢丝绳进行，各伸缩臂同步伸缩。
The boom telescoping mechanism is shown as follows.
吊臂伸缩机构如下图所示。
Model RT550 wheel type off-road crane; Load carry and travel; Boom telescoping with load; Lift operation;
RT550型越野轮胎起重机； 吊运行驶； 带载伸缩； 起重作业；
Model RT550 wheel type off-road crane; Load carry and travel; Boom telescoping with load; Lift operation;
RT550型越野轮胎起重机； 吊运行驶； 带载伸缩； 起重作业；
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