Obtain the proper kind of hydrogen peroxide. You can use hydrogen peroxide to clear acne using one of two methods: in a cream, which contains a concentration of up to 1% hydrogen peroxide; and in âpureâ liquid form, which should contain no more than a 3% concentration.
3. Pitch : Pitch is the theoretical distance a propeller will move through the water for each revolution. (i.e. a 21pitch propeller should move a boat forward 21 for each revolution, assuming there is no slippage).
The noun VARIABLE-PITCH PROPELLER has 1 sense: 1. propeller for which the angle of the blades is adjustable. Familiarity information: VARIABLE-PITCH PROPELLER used as a noun is very rare.