午夜性色福利在线视频福利丨久久caoporn国产免费丨国产成人精品免费视频大全丨最新国产av无码专区亚洲丨亚洲中文字幕无码永久在线不卡丨婷婷在线视频观看丨中国av一级片丨a一级黄色丨桃色视频m3u8丨100岁老太毛片丨精射女上司丨国产日产欧洲无码视频无遮挡丨人妻少妇精品无码专区app丨99久久精品国产自在首页丨91另类丨在线观看免费视频黄丨亚洲免费视频一区二区三区丨3d动漫精品啪啪一区二区中丨精品无码久久久久久久动漫丨国产成人精品人人2020视频丨国产边摸边吃奶边做爽视频丨涩av丨中文字幕无线码一区2020青青丨一级视频片丨国产精品一区二区在线观看

The Grease Dropping Point Tester is designed and manufactured in accordance with the requirements of the National Petrochemical Industry Standard SH/T0115 "Determination of Grease and Solid Hydrocarbon Dropping Point". This instrument is an air bath. It measures the dropping point of grease and solid hydrocarbons with a dropping point above 100°C, that is, puts the grease and solid hydrocarbons into the grease cup of the dropping point thermometer, and puts them in the grease cup under specified heating conditions. The temperature at which the sample drops a drop of liquid or flows out of an oil column 25mm is called the dropping point.