Chisels, screw drivers and pointed tools should never be carried in your pockets.
凿子、螺丝刀及带尖端的工具绝不可放在口袋中携带。
It is pointed out that for the same specification of the pump, to enlarge the screw Angle can increase its flow rate.
对同一规格的产品，指出可以采用增大螺旋角的方法提高其流量。
He has perfected a technique of etching letters onto microscopic surfaces-including the tip of a screw, the head of a pin and the pointed end of a paperclip.
他已练就了在微观物体表面雕刻字母的绝佳技艺，包括雕刻螺丝钉的尖端、饰针的顶部和曲别针的尖端。
He has perfected a technique of etching letters onto microscopic surfaces-including the tip of a screw, the head of a pin and the pointed end of a paperclip.
他已练就了在微观物体表面雕刻字母的绝佳技艺，包括雕刻螺丝钉的尖端、饰针的顶部和曲别针的尖端。
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