do not be too tight between the chain and the guide plate. when the electric chain saw works, the lubricating oil can be used once every 10 minutes to maintain not only the guide plate but also the chain. meanwhile, the variable box of the chainsaw also needs glycerine once a year, and the motor needs to change the carbon brush frequently, about once every six months.chain saws are not allowed t...

introduction to theelectric wrench is a power supply or battery - powered wrench, is a tightening bolt tools. it is mainly divided into impact wrench, twist shear wrench, fixed torque wrench, angle wrench, angle wrench, hydraulic wrench, torque wrench, charging electric wrench.applicationthe electric wrench is mainly used in the steel structure installation industry, specially for the installati...