What does 2 Samuel 21:19 mean?

And there was again war with the Philistines at Gob; and Elhanan the son of Jaare-oregim the Beth-lehemite slew Goliath the Gittite, the staff of whose spear was like a weaver’s beam.

And there was again a battle in Gob with the Philistines, where Elhanan the son of Jaare–oregim, a Beth–lehemite, slew the brother of Goliath the Gittite, the staff of whose spear was like a weaver’s beam.

And there was again war with the Philistines at Gob; and Elhanan the son of Jaare-oregim the Beth-lehemite slew Goliath the Gittite, the staff of whose spear was like a weaver’s beam.

And again there was war with the Philistines at Gob, and Elhanan, the son of Jair the Beth-lehemite, put to death Goliath the Gittite, the stem of whose spear was like a cloth-worker's rod.

And the battle is again in Gob with the Philistines, and Elhanan son of Jaare-Oregim, the Beth-Lehemite, smiteth <FI>a brother of<Fi> Goliath the Gittite, and the wood of his spear <FI>is<Fi> like a beam of weavers.

And there was a third battle in Gob against the Philistines, in which Adeodatus the son of the Forrest an embroiderer of Bethlehem slew Goliath the Gethite, the shaft of whose spear was like a weaver's beam.

And there was again a battle at Gob with the Philistines; and Elhanan the son of Jaare-oregim, a Bethlehemite, smote Goliath the Gittite; now the shaft of his spear was like a weaver's beam.