| F: | MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
| F01: | ENGINES OR PUMPS; MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES |
| F05: | INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 |
| F05B: | INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G |
| F05B2260/00: | Function |
| F05B2260/70: | . Adjusting of angle of incidence or attack of rotating blades |
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