plumb bob meaning in English
铅锤，线锤。
Examples
- If the mass in question is a plumb bob , the horizontal component of f is important
如果所讨论的质量是一摆锤，则重要的是f的水平分量。 - Tool that needs to be prepared during the installation : churn drilling , corner mill machine , welding machine , tapeline , plumb bob , glue pincers , iron chisel , 810 expansion bolt , cross and subtraction sign screw driver etc
安装所需准备的工具：冲击钻角磨机焊机拉尺线锤胶钳铁凿8x10膨胀螺丝十字和一字螺丝批等。