释义 |
jack-chain [f. Jack n.1 7: because used in roasting-jacks.] 1. A chain each link of which consists of a double loop of wire, resembling a figure of 8, but with the loops in planes at right angles to each other; the links are not welded.
1639W. Cartwright Royall Slave i. ii, If you'l make use of any ornaments, I've a couple of jack-chains at your service. 1676Wycherley Pl. Dealer i. i, Here you see..a great Lord [bowing] to a Fishmonger, or Scrivener with a Jack-chain about his neck. 1801Trans. Soc. Arts XIX. 125 Six lengths of jack-chain. 1892Pall Mall G. 23 Sept. 6/2 Much stronger than ordinary welded or jack chains. 2. Logging. (See quot. 1905.)
1905Terms Forestry & Logging (U.S. Dept. Agric. Bureau Forestry) 40 Jack chain, an endless spiked chain, which moves logs from one point to another, usually from the mill pond into the sawmill. 1957in Brit. Commonwealth Forest Terminol. ii. 97. |