a homogeneous appearance 说谁呢(分析)? Sample Preparation—The whole sample, as received,shall be thoroughly mixed using a stirrer when practicable for 30 s. In all cases, a sample taken on a glass or PTFE rod dipped to the bottom of the container must show a homogeneous appearance . For fuels with a high wax content (high pour point), or of very high viscosity, the sample must be heated before stirring. The temperature, as measured with the general purpose temperature measuring device, must be either 15°C above the pour point in the case of low viscosity fuels, or that equivalent to 150 to 250 cSt in the case of high viscosity fuels. In no case shall the temperature exceed 80°C. ( 摘自ASTM D4870。) 黑体标红是指“试样”还是指“ 玻璃棒 (PTFE棒)”要有均匀的外观? 已经喝了一杯咖啡啦,下午大脑仍旧处于缺氧状态。听听大家的意见。 查看更多21个回答 . 1人已关注