4. Remove butt plate deep for feeding or rice, we can bring the device to perform the experiment.5. the eyedropper (the dropper) Is a device used for measuring small quantities of liquid made by count drops of liquid that drips down and can be compared with standard (calibrate) the measuring cylinder, and then use the estimated value for continue to trial the eyedropper feature? At the end of a glass tube with a long taper side. And at the end of the other side with rubber bulb wear.
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