油锯

• Forestry machinery . portable chain - saws . minimum handle clearance and sizes
  林业机械.油锯.手把最小空隙和尺寸
• Forestry machinery - portable chain - saws and brush cutters - exhaust system - caused fire risk
  林业机械便携式油锯和割灌机易引起火险的排放系统
• It had taken more than an hour , but he always took extra precautions when he was working with a chain saw
  他做这些已经花了一个多小时，但是为了防止意外发生，在使用油锯前，他总要额外检查一番。