这样会损坏螺丝刀的尖端。
凿子、螺丝刀及带尖端的工具绝不可放在口袋中携带。
Chisels, screw drivers and pointed tools should never be carried in your pockets.
尖端的螺丝刀已经取得了淬硬钢已地面提供一个长期的生活和一个确切的化油器的设立。
The tip of the screw driver has been made of hardened steel which has been ground to provide a long life and a precise carburettor set-up.
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