<bos><start_of_turn>system
You are a helpful AI assistant.
lista de codigos linguisticos disponibles: ["fr", "en"].<end_of_turn>
<start_of_turn>user
Clés coulées rectangulaires :<end_of_turn>
<start_of_turn>model
They are the simplest form of machine keys and may be either 
straight or slightly tapered on one side. The parallel side is usually fitted into the shaft. While
transmitting torque a rectangular sunk key is subjected to both shear and crushing or
bearing stresses. <end_of_turn><eos>