portable spectrophotometer meaning in English

便携式分光光度计

Test method for determination of potential instability of middle distillate fuels caused by the presence of phenalenes and phenalenones . rapid method by portable spectrophotometer
Phenalenes和phenalenones产生的中间馏出燃料潜在不稳定性的测定方法.便携式光谱仪快速测量法
Standard test method for determination of potential instability of middle distillate fuels caused by the presence of phenalenes and phenalenones rapid method by portable spectrophotometer
测定由于phenalenes和phenalenones存在而产生的中间馏出燃料的潜在不稳定性的标准试验方法