| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS [0027]FIG. 1 is a longitudinal cross sectional view of one embodiment of a biofilm cleaning efficacy device of the invention. [0028]FIG. 2 is a longitudinal cross sectional view of a portion of another biofilm cleaning efficacy device in accordance with the principles of the present invention. [0029]FIGS. 3 and 4 are cross-sectional views taken along line 3-3 of F
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