Using the lever principle makes work labor-saving and efficient

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The process by which workers use the principle of levers to move scaffolding The process by which workers use the principle of levers to move scaffolding
using the lever principle using the lever principle
Slag cleaning with a crowbar made using the lever principle Slag cleaning with a crowbar made using the lever principle
A simple hoisting device made using the lever principle A simple hoisting device made using the lever principle
Use the lever principle to improve work efficiency. Use the lever principle to improve work efficiency.
The process of transporting wood using the lever principle = worth sharing The process of transporting wood using the lever principle = worth sharing
Use the lever principle to push the concrete onto the ramp, saving effort and being efficient! Use the lever principle to push the concrete onto the ramp, saving effort and being efficient!
Skillfully use the lever principle to lift cement slurry upstairs Skillfully use the lever principle to lift cement slurry upstairs