| 摘要 |
PURPOSE: A conical volumetric tube having constant volume is provided to correctly measure materials by forming a space part with the fixed volume of 0.5-1.5mL on the bottom of a body part of the conical tube, and to reduce measuring time of the tube. CONSTITUTION: A conical volumetric tube having constant volume includes a space part(3) having the fixed volume of 0.5-1.5mL on the bottom of a body of a cylindrical conical tube. A connection part of the bottom part and the space part in the conical tube body is gradually tapered. The scales of 0.5-1.5mL are made on the connection part and precisely measure the volume of 0.5-1.5ml.
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