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单词 train bolt
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train bolt
train bolt n. (a) Navy a ringbolt for securing the train tackle of a gun to a ship's deck (obsolete); (b) Mechanics a large, substantial bolt.
ΚΠ
1822 G. Marshall Pract. Marine Gunnery 62 Take a short strap and put it over the pomillion of the gun, hook on your single bolt to that, the end of the fall, the reeve through the train bolt on deck, and haul it well taut.
1863 S. B. Luce Seamanship (ed. 2) vi. 75 If..the blocks were reversed, the effort would be applied to rouse the train bolt out of the deck, rather than to run the gun in.
1875 U.S. Patent 159,791 1/1 The object of my invention is to obtain greater security in the fastening of safes by means of locks which do not set in motion the main or train bolts, but which serve as obstacles to their being withdrawn unless unlocked.
1921 Railway Jrnl. Dec. 25/1 The Pennsylvania has placed an order for 50,000 heat treated train bolts.
2004 N. Cortese Modelling IS Heavy Tank Introd. 6/1 (caption) My punch set—every modeller should have one of these, although I also use plastic train bolts and nuts.
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