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span-block
span-block n.
Brit. 
/ˈspanblɒk/
, /ˈspanblɒk/U.S. /ˈspænˌblɑk/
/ˈspænˌblɑk/ΚΠ
1860 H. Stuart Novice's or Young Seaman's Catech. (rev. ed.) 23 Reeve it..through the span block on the top~mast cap.
1867 W. H. Smyth & E. Belcher Sailor's Word-bk. 640 Span-blocks, blocks seized into each bight of a strap, long enough to go across a cap, and allow the blocks to hang clear on each side.
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