blade pitch معنى"blade pitch" أمثلة على زاوية ميل شفرة المروحة الدافعة "blade" معنى "pitch" معنى "pitch" معنى "pitch in" معنى "blade" معنى "apply pitch to" معنى "be pitch-black" معنى "elevator pitch" معنى "football pitch" معنى "pitch (music)" معنى "pitch (resin)" معنى "pitch a tent" معنى "pitch angle" معنى "pitch black" معنى "pitch dark" معنى "pitch into the water" معنى "pitch invasion" معنى "pitch lake" معنى "pitch perfect" معنى "pitch pine" معنى "pitch sensor" معنى "pitch-and-toss" معنى "pitch-black" معنى "pitch-dark" معنى "roof pitch" معنى أمثلة Kaplan turbines with adjustable blade pitch are well-adapted to wide ranges of flow or head conditions, since their peak efficiency can be achieved over a wide range of flow conditions.
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