| 释义 |
welded, ppl. a.|ˈwɛldɪd|
[f. weld v. + -ed1.]
1. a. United by welding.
1869Scientific Opinion 10 Feb. 270/1 The wire had been drawn from welded palladium. 1905Westm. Gaz. 27 June 2/1 The immensely expensive welded-iron gun to which Sir W. Armstrong was wedded.
b. transf. and fig.
1837Sir F. Palgrave Merch. & Friar (1844) Ded. 4 The welded mass of haut ton, or low ton. 1862Lytton Str. Story xxiii, The welded strength of its sinews was best shown in the lightness and grace of its movements. 1878Browning Poets Croisic lxxi, Welded lines with clinch Of ending word and word. 1898Allbutt's Syst. Med. V. 1008 The firm, thick, fibrous septum of the welded valve-structures.
2. welded joint, = welted joint: see welt v.
1882W. J. Christy Joints 197 This variety [of overlapping joint] thus compactly rolled together is otherwise termed a welded joint.
3. Geol.
a. Applied to pyroclastic rock formed by the union of small, heat-softened particles.
[1802: see weld v. 2 b (b). 1899J. P. Iddings in A. Hague et al. Geol. Yellowstone Nat. Park ii. x. 406 The mass is compact of glass, but it consists of irregularly shaped streaks and patches of different color. These twist and curve about one another and appear like a perfectly welded mass of strips or ribbons and irregular fragments of variously colored glass.] 1909― Igneous Rocks I. i. viii. 333 These examples of welded pumice are from rhyolitic lavas in the Yellowstone National Park. 1935Trans. Amer. Geophysical Union 309 Although commonly and perhaps generally associated with deposits of light⁓colored volcanic ash of rhyolitic composition, the welded tuff is not confined to this association but occurs also on older rocks. 1962,1970[see ignimbrite]. 1977A. Hallam Planet Earth 74/1 There may also be intercalations of submarine pillow lavas or welded tuffs indicative of volcanic islands.
b. Applied to an intimate, close-fitting contact between two bodies of rock that have not been heat-softened or tectonically disrupted.
1939Q. Jrnl. Geol. Soc. XCV. 354 The contact is, as usual, welded, and the base of the overlying sediments consists of current-bedded, brown-weathering, fine sandstone. 1948R. R. Shrock Sequence in Layered Rocks ii. 55 There are examples..where an entire geological system is represented by the hiatus along the welded contact. 1976Jrnl. Geol. Soc. CXXXII. 125 The contact of the slump sheets with the overlying mega-beds is welded, i.e. depositional fit is present. |