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ANGULATED PIPE FORMED BY BENDING EACH CORNERS OF THE RECTANGULAR PIPE INWARD PERPENDICULARLY AFTER FORMING STRIP CONTINUOUSLY SUPPLIED IN RECTANGULAR PIPE AND FORMING SYSTEM THEREOF
ANGULATED PIPE FORMED BY BENDING EACH CORNERS OF THE RECTANGULAR PIPE INWARD PERPENDICULARLY AFTER FORMING STRIP CONTINUOUSLY SUPPLIED IN RECTANGULAR PIPE AND FORMING SYSTEM THEREOF