The goniometer eyepiece consists of a rice reticle and an optical dial and is an essential accessory for the tool microscope. The reticle and dial are used to aim the workpiece and measure the angle, respectively. Usually, the degree of coincidence of the reticle engraving line and the image of the contour of the device under test is called aiming accuracy, and the aiming accuracy directly affects the accuracy of the measurement. Therefore, the scientific use of the girth of the eyepiece is very important.
In the clinical medical experiments usinghuman venous blood as specimensome take the serum from the specimen as the experimental object.The blood collection tubes suitable for this type of medical tests are called serum blood collection tube.
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