英和和英

名詞

undercutter (複数形 undercutters)

1. One who, or that which, undercuts.
   • 2011, Evidentialism and its Discontents page 52

     It is thus clear that adding an undercutter of this sort to the story changes the total evidence with respect to the claim in question. That is, in the case of typical undercutters, a metalevel claim filters down into the body of evidence in question precisely because an undercutter is a defeater and hence alters the total evidence with respect to the claim in question. There are two important differences between typical undercutters and the role of reflective ascent in the face of disagreement.

   • 2014, Economics and the Interpretation and Application of U.S. and E.U. Antitrust Law: Volume I Basic Concepts and Economics-Based Legal Analyses of Oligopolistic and Predatory Conduct page 281

     does identify it as the undercutter, and (4) its estimate of the amount of benefits the contriver will confer on it by “reciprocating” if but only if it does cooperate by foregoing inherently-profitable undercutting-opportunities to let the potential undercutter secure COMs from the potential undercutter's own customers.

2. A type of plough.
   • 1985, Technologies to benefit agriculture and wildlife: workshop proceedings page 13

     The undercutter plow is a farm implement currently used for weed control on many farms in the winter wheat/fallow region of the Great Plains States and the Intermountain West. Undercutters are large (3 to 7 feet wide) V- shaped blades or sweeps that are pulled by tractors through a field 3 to 6 inches under the soil surface. Using an undercutter instead of a disc can control weeds, retain soil moisture, and save many bird nests and flightless birds present in the stubble

3. (engineering) A type of bit.
   • 2005, Bill Hylton's Frame & Panel Magic page 63

     The undercutter produces a rabbetlike recess on the back of the panel. This allows you to use W'-thick stock for panels without having to cut excessively deep with the panel-raising bit. An undercut panel ends up being flush with both the face and the back of a standard frame. An undercutter can be purchased as a separate bit. After raising the panels, use the undercutter to relieve that panel back as necessary to size the tongue.

4. A device for excavation, used on railways.
   • 1962, Popular Science Vol. 180 No. 2 page 72

     […] train of dump cars hauled behind undercutter machine loads rear car first, then ones ahead of it. Using undercutter avoids need for removing track.

5. (mining) A device for cutting into rock walls from below.
   • 1926, Coal Age - Volume 30, page 67:

     The top and bottom portions of the machine are exactly alike and it may consequently be turned over and employed as an overcutter as well as an undercutter.

   • 1960, Colliery Guardian Overseas, page 50:

     In addition to its work on longwall faces, the A.B. Fifteen has been adapted for shortwall work either as undercutter or as overcutter, particular care having been taken to give it increased manoauvrability by the provision of special pulleys, and increased mobility by the addition of a tilting underframe.