A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame（）.<br>A:stopper<br>B:screen<br>C:filter<br>D:restrictor

A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame（）.
A:stopper
B:screen
C:filter
D:restrictor

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