Chain saw guide bar with replaceable liquid-conducting tubes

A guide bar for use in a first position in a chain saw, comprising:

• a first side plate including a longitudinal center slot and a first plurality of liquid spray holes;
• a second side plate including a longitudinal center slot and a second plurality of spray holes;
• a center plate disposed between the first and second side plates, and including a longitudinal center slot;
• and
• a plurality of liquid-conducting tubes disposed in the center slot of the center plate, the tubes having outlet ends communicating with respective ones of the spray holes disposed in the first side plate, so that spraying of liquid occurs through the first side plate;
• wherein said first, second and center plates define a plate structure of said guide bar, the plate structure being rotatable about a longitudinal center axis thereof for use of said guide bar in a chain saw in a second position, the outlet ends of the tubes being removable from the first plurality of spray holes and connectable to the second plurality of spray holes after the plate structure has been rotated, so that spraying occurs through the second side plate;
• and
• wherein the longitudinal slot of the center plate includes a widening extending laterally in two opposite lateral directions, the longitudinal slot of the first side plate includes a widening extending in one lateral direction, and the longitudinal slot of the second plate includes a widening extending in a lateral direction which is opposite to said one lateral direction.