Annyira azért nem rossz az A-M műszaki szótár.
Áteresztő köszörülés: Through-feed grinding
Beszúró köszörülés: Infeed..., plunge-cut...., plunge grinding
A
https://tudasbazis.sulinet.hu/hu/szakkepzes/gepeszet/gepesze...
szerint mindkettő csúcs nélküli köszörülés. Ez a link le írja a két köszörülési módot, és rajzot is mutat, ami - szerintem - alá is támasztja a fenti angol kifejezések helyességét.
Ezek ráadásul, az általad megadott angol nyelvű linken is szerepelnek, A Centerless grinding alatt.
https://www.google.com/search?ei=xc1aXv2fC4L3qwGIyKLIDw&q=in...
Thru-feed grinding is a type of centerless grinding. During this process, the workpiece passes through the machine itself. ... The workpieces must be manually loaded into the grinding machine and then the regulator wheel is manually moved, as well. This process is optimal for complicated parts and wheel shapes.
https://www.google.com/search?ei=xc1aXv2fC4L3qwGIyKLIDw&q=in...
End-feed grinding is a technique used in machining when working with a centerless grinder. ... This allows a faster rate of work because pieces can be more quickly engaged and disengaged from the process, and of its two wheels, one is a grinding wheel, and the other is a regulating wheel.

https://en.wikipedia.org/wiki/Centerless_grinding
In through-feed centerless grinding, the workpiece is fed through the grinding wheels completely, entering on one side and exiting on the opposite. The regulating wheel in through-feed grinding is canted away from the plane of the grinding wheel in such a way as to provide an axial force component, feeding the workpiece through between the two wheels. Through-feed grinding can be very efficient because it does not require a separate feed mechanism; however, it can only be used for parts with a simple cylindrical shape.[2]
End-feed
In end-feed centerless grinding, the workpiece is fed axially into the machine on one side and comes to rest against an end stop; the grinding operation is performed, and then the workpiece is fed in the opposite direction to exit the machine.[2] End-feed grinding is best for tapered workpieces.
In-feed centerless grinding is used to grind workpieces with relatively complex shapes, such as an hourglass shape. Before the process begins, the workpiece is loaded manually into the grinding machine and the regulating wheel is moved into place. The complexity of the part shapes and grinding wheel shapes required to grind them accurately prevent the workpiece from being fed axially through the machine.

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Note added at 22 hrs (2020-03-01 16:24:16 GMT)
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"le írja" :) -- >Nem én választottam ketté.

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Note added at 2 days 11 hrs (2020-03-03 05:17:53 GMT) Post-grading
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Köszönöm.