IC 019. US 001 012 033 050. G & S: PLASTIC TRUNKING AND DUCTING FOR HOUSING PIPES AND PLASTIC JOINING AND CONNECTION PIECES THEREFOR, NAMELY, CONNECTORS, COUPLINGS, T-PIECES, END PIECES, ADAPTORS, INTERCONNECTING PIECES, ELBOWS, STOP-ENDS, BOX-ADAPTORS, REDUCERS, BENDS AND JUNCTION BOXES
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