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1.
An oxyacetylene cutting torch
Gimme the smokewrench, this fuckin' U-bolt is rusted solid.
by Dr. Badwrench September 21, 2006
 
2.
an oxy-acetylene torch, most often used for welding, brazing or cutting metal
He used a smoke wrench to weld the frame and the table caught fire.
by jack_daft May 10, 2005