The 2 classes are Class A and Course B. Class A pipettes are made to precise tolerances, or "error restrictions". Class B are permitted 2 times the error boundaries of Course A. The class specification or serial amount of Class B will not be marked. The forward method is the https://cashbmtaf.diowebhost.com/84522845/helping-the-others-realize-the-advantages-of-laboratory-pipette-types