Features
Test tube, a commonly used instrument in chemical laboratories, is used as a reaction container for a small amount of reagents. It should be used at room temperature or when it is heated (preheat before heating, otherwise the test tube may burst easily.). Test tubes are divided into ordinary test tubes, test tubes with branches, and centrifuge test tubes. The specifications of ordinary test tubes are expressed by outer diameter (mm) × length (mm), such as 15×150, 18×180, 20×200, etc.
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