GreenWorks ST40L210 El Manual Del Propietario página 17

OPERATION
LENGTHENING THE LINE See Figure 11.
While the string trimmer is operating, the cutting line gets worn down and becomes shorter. This
trimmer is equipped with bump feed line advancement, which advances additional line once the
head is bumped on the ground while rotating. The cutting blade will cut the line to keep an
accurate cutting swath.
Fig.11
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