These marks must be durable for the useful life of the engine and must be clearly legible and indelible.

Estas marcas deberán durar toda la vida útil del motor y ser claramente legibles e indelebles.

http://wt.jrc.it/lt/Acquis/ 9/4/2009

http://wt.jrc.it/lt/Acquis/ 9/4/2009