English to Russian Tech/Engineering Forestry / Wood / Timber форвардеры/ха

Инструкция харвестерной головки. Фраза встречается в таких вот контекстах: http://www.machinerie.com/ManuelOperateur/patu/tete/MOTOMIT_...

* Sound signal, when a block of this product type has stopped inside the cutting window.

* Cutting window
Allowed lower and upper limits for the cutting tolerance per product type.
E.g. preset SPRUCE LOG 400cm
Cutting window : Bucking length
0 – 50 mm = 400 – 405 cm
-30 – 30 mm = 397 – 403 cm )*
30 – 80 mm = 403 – 408 cm
)* Don’t forget the minus sign, when needed. If both of the limits are set to same value, the cutting window is 0
mm and it is impossible for the head to stop at that length.

* Difference between the nominal length and the cut length should be made by shifting the cutting window wholly to the positive side, for example from +120mm to +170mm.

* If the stem has not stopped inside the cutting window, the computer will give feeding pulses, ‘control pulses’ to
feed the stem into the cutting window.

Спасибо заранее.