| 释义 |
spall
I. noun
also spawl \ˈspȯl\
(-s)
Etymology: Middle English spalle — more at spale
1. : chip, flake; especially : a small fragment broken from the face or edge of a material (as stone, metal, concrete, glass, or a ceramic product) and having at least one featheredge
< spalls from marble-dressing operations — H.P.Chandler & Nan Jensen >
2. : a fragment removed from a rock surface by weathering
< few exfoliation spalls detach themselves from the parent mass in the form of lenses — Journal of Geology >
3. : cross-spale
II. verb
also spawl \“\
(-ed/-ing/-s)
transitive verb
1. : to break up (ore) with a hammer usually preparatory to crushing
2. : to reduce (as irregular stone blocks) approximately to size by chipping with a hammer
3. : to cause to break off in spalls
< avoid spalling the concrete in drilling >
intransitive verb
1. : to break off chips, scales, or slabs from the surface or edge often as the result of a rapid change of temperature : exfoliate
< the dead-burned magnesia produced does not spall — R.N.Shreve >
— often used with off or away
< the spalling off of the outer layers of a rock >
< frost action … and other unavoidable influences tend to cause the mortar to spall away from the joints — Railway Engineering & Maintenance Cycl. >
2. : to split off particles as the result of bombardment in such a manner that a large part remains — used of a surface, target, or nucleus
III. noun
(-s)
Etymology: alteration of spauld
archaic : shoulder |