density bottles

• 密度瓶

density bottles的用法和样例：

例句

1. Compared with international density flask method, it had the advantages of rapid measurement, compared with alcoholmeter method, its measurement results were more accurate.
   结果表明，与国标密度瓶法相比具有快速的特点，与酒精计法相比具有结果准确的优点。