Compares the mass of a body with that of another body of known mass (weight); when two pans hanging from a bar (beam) are in balance, the two weights are equal. 将一个物体的质量与另一个已知质量（重量）物体的质量进行比较；当悬挂在杆（梁）上的两个平底锅处于平衡状态时，两个重量相等。
2
pan
[pæn]
平底锅
Flat rigid support that holds either the body to be weighed or the weights. 支撑被称物体或重物的扁平刚性支撑。
1
beam balance
杠杆式天平[ 利用杠杆平衡原理测量物体质量的天平
Compares the mass of a body with that of another body of known mass (weight); when two pans hanging from a bar (beam) are in balance, the two weights are equal. 将一个物体的质量与另一个已知质量（重量）物体的质量进行比较；当悬挂在杆（梁）上的两个平底锅处于平衡状态时，两个重量相等。
2
pan
[pæn]
平底锅
Flat rigid support that holds either the body to be weighed or the weights. 支撑被称物体或重物的扁平刚性支撑。
