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Engine grass trimmer that is used to work mowing fields and gardens, in the bank, etc.High durability and reduced vibration are achieved by using robust aluminum for the fan case.2 piston rings compared to the conventional single piston ring improve combustion chamber sealing to secure gas pressure.These models feature 4 ball bearings, rather than the conventional 3, reducing axial run-out of drive shaft and gears, and durability.
Takafumi Ito,Shinichi Kakefuda,Design Center,Reserch&Development Division, Hitachi Koki.co.,Ltd.
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