RQWUDFWRUV. FRQWUDFWRU LV QRUPDOO\ HQJDJHG WR FDUU\ RXW D VSHFLILF WDVN RU SKDVH DW D SUH-GHWHUPLQHG FRVW DV VHW RXW LQ D ZULWWHQ FRQWUDFW ZLWK FOHDU GHOLYHUDEOHV DQG GHDGOLQHV. &RQWUDFWRUV FDQ EH XVHG WR GR D VSHFLILF WDVN OLNH D WLPEHU FUXLVH RU PXOWLSOH SKDVHV VXFK DV D IXOO-SKDVH FRQWUDFWRU WKDW EXLOGV URDGV, ORJV DQG KDXOV (VWXPS WR GXPS).
