特殊用法adjustable counterweight1.可调平衡锤bell counterweight1.料钟平衡锤compensating counterweight1.平衡锤interlocking frame counterweight1.联锁机平衡锤［重锤］jack shaft counterweight1.曲柄轴平衡块semaphore counterweight1.臂板平衡锤［重锤］spindle counterweight1.接轴平衡锤tail lever counterweight1.尾杆平衡锤