TOP HOW MANY TYPES OF PIPETTES ARE THERE SECRETS

The two lessons are Course A and Course B. Course A pipettes are made to exact tolerances, or "error limitations". Course B are allowed two times the error limits of Class A. The class specification or serial number of Class B will not be marked.$begingroup$ In olden days, (I had been taught to both equally suck up and blow out a pipet by MOUTH), T