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Factory price glass test tube flat round bottom high borosilicate test tube 15*150 18*180 20*200 25*200mm

Glass stirring rod round head solid drainage Rod borosilicate glass diversion Rod Lubert tear raw material glass rod

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High Borosilicate Glass Stirring Rod Glass Rod Diversion Rod Corrosion Resistant Solid Round Head Transparent for Laboratory Use

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Flat glass test tube 10*75 16 * 160mm chemical equipment laboratory thickened glass round bottom test tube

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