| 释义 |
ˈunderfill, n. Metallurgy.
[f. under-1 10 b, after overfill n.]
The condition of there being insufficient metal to fill the aperture between rolls, the impression of a die, etc., so that the desired shape is not taken; a bar or the like that is too small for the rolling it is to undergo.
1924F. W. Dencer Detailing & fabricating Struct. Steel xxvii. 355 Underfills.—A defect of this kind may result from cobbling, and generally is cause for rejection of the pieces affected. 1929,1957[see overfill n.]. 1970Welding Engineer July 24/2 With three of four tetra axis welds inclined to the bottom plane, weld underfill would make conventional welding difficult without a special positioner. |