Precise impulse consequently has deep impacts around the achievable delta-v and associated orbits achievable, and (with the rocket equation) mass fraction necessary to obtain a offered delta-v. Optimizing the tradeoffs involving mass fraction and certain impulse is among the fundamental engineering worries in rocketry.- This advertising will not be
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ទ័ពជើងវែង (ដំបងវែង) និងបុគ្គលិកខ្លី (ដំបងឃ្លី) គឺជាអាវុធទូទៅក្នុងក្បាច់គុនល្បុក្កតោ និងក្បាច់គុនខ្មែរ។ ល្បុក្កតោ ឬ ល្បុក្កតោ (