Выражение встречается в следующем контексте:
If residue wheel(s) gauge their depth by mounting solid to face of row-unit, then prefer mounting as close as possible to seed opener/gauge wheels

Заранее спасибо

Case-IH firming point/wedge should have the bottom edge cut away so it doesn’t protrude below the openers after they have worn down some

совершенно мутное предложение
о сеялках и сошниках