人类为什么要使用手动工具?
您能想象到手动工具造成伤害的方式吗?
Can you can think of a way that people may get hurt using hand tools?
使用手动和电动工具测量,切割,螺纹和弯管使其成为所需的形状。
Measure, cut, thread and bend pipe to required shape using hand and power tools.
使用手动和电动工具测量,切割,螺纹和弯管使其成为所需的形状。
Measure, cut, thread and bend pipe to required shape using hand and power tools.
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