inner balance arm 内平衡臂
outer balance arm 外平衡臂
balance arm file 小三角锉
i er balance arm 内平衡臂
cruciform balance arm 十字形天平臂
equal arm balance [仪] 等臂天平
equal-arm balance 一种简单天平 ; 等臂天平
Weight balance by swing arm 配重摆臂式缓冲杆
The loading of balance arm is distributed averagely, which improve the operating stability.
均衡梁平等的分配载荷，改善了操控稳定性。
The elongated structure, such as a boom, the balance arm, can be in the oral suspension, determine reasonable hanging point.
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 tower crane is mainly composed of vertical tower, horizontal tower, tower tower and balance arm, as shown in Figure 3.67.
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。
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