Whether the bacteriostatic ring measures the inner ring or the outer ring.

The bacteriostatic ring measures the inner ring and the outer ring. Because if there is a double-layer bacteriostatic circle, general drugs measure the inner ring, and sulfonamides measure the outer ring. If there are scattered colonies in the bacteriostatic circle, eliminate the existence of influencing factors such as contaminated bacteria. If there are no contaminated bacteria, it needs to be redone. So the bacteriostatic ring measures the inner ring and the outer ring.