rubber balloon meaning in Chinese
橡皮气囊
Examples
- Soil quality . physical methods . measuring of the bulk density . rubber balloon density apparatus
土质.物理检测方法.松密度的测定.橡胶气球密度仪 - Standard test method for density and unit weight of soil in place by the rubber balloon method
用橡胶气球法测定现场土壤密度和单位重量的标准试验方法