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HOW MUCH WOOD was used by the machine? A FEW trees.
by BobWebb

Ji made a machine from a wooden table
by poptart

Wooden table required to make machine components.
by Ravikanth77

The Ancient Chinese utilized many wooden machines such as a carriage.
by phan21

many wood only one machine
by jatropos

Use a tree/wood to build a table, and the table to build a machine.
by laobei