1. From simplifying the pre-treatment of petroleum ether, replacing the funnel by content bottle and taking the filter paper funnel as a separatory funnel, the technique is improved. 针对测定前水样的处理,通过简化石油醚的预处理、以容量瓶代替分液漏斗、以滤纸斗代替砂芯漏斗等措施,对紫外分光光度法测定水中油含量的技术进行了改进。
2. Based on results, we can know the first funnel type of concentrator can change material inside the funnel type to promote light flux. 本文结果显示第一种是漏斗型集光器,可以改变漏斗型集光器内部材质来提升光通量;
3. Based on results, we can know the first funnel type of concentrator can change material inside the funnel type to promote light flux. 本文结果显示第一种是漏斗型集光器,可以改变漏斗型集光器内部材质来提升光通量;
4. Black plastic coffee funnel and separate tea funnel included. 具黑色咖啡漏斗和茶两种独立漏斗。
5. Automatic Funnel, is the one and only plastic magic funnel with a valve. 自动漏斗, 是仅有的塑料魔术的漏斗与阀门。