“平衡臂”是天文学专有名词，来自中国天文学名词审定委员会审定发布的天文学专有名词中文译名。
对长形结构件，如起重臂、平衡臂，可在地口试吊，断定公道吊点。
The elongated structure, such as a boom, the balance arm, can be in the oral suspension, determine reasonable hanging point.
平衡重块安装位置不准确，会造成起重臂与平衡臂平衡力矩偏差过大，轻易造成塔吊失稳。
Balance weight block installation position is not accurate, will cause the boom and the balance arm balance torque deviation is too large, easily lead to instability of the tower crane.
塔式起重机主要由竖直塔身、水平塔臂、塔顶和平衡臂等主要部件组成，如图3.67所示。
The tower crane is mainly composed of vertical tower, horizontal tower, tower tower and balance arm, as shown in Figure 3.67.
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