Filling the cylinder with leadshot to simulate a sample's weight.
圆柱里面灌铅，以模拟样本的重量。
2
For small models we can use as weights containers filled with leadshot.
对于小模型，可用装满铅丸的容器作为砝码。
3
It is permissible to use additives, such as bags of leadshot, to achieve the requisite total package mass, so long as they are placed so that the test results are not affected.