Disclosed is a squeegee doctor printing or coating mechanism, which comprises a squeegee doctor (5) arranged on the upper side of a substrate (1) to be printed or coated, a pressing member (6) formed of a magnetic material and mounted on the squeegee doctor (5), and an electromagnet (8) arranged on the lower side of the substrate (1) at a position confronting the squeegee doctor (5), wherein the squeegee doctor (5) is pressed to the substrate (1) by the pressing member (6) when the pressing member (6) is attracted by the electromagnet (8).
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