triple expansion steam engine triple-frequency harmonic triple-grid amplifier triple integral triple-pole triple-roller chain triple-screw ship triple-start thread triple steel triplet triple-tariff meter triple-tariff metre triplet fine structure triplet impulse triplet positronium triplet state triplet term trip lever triple-wound transformer triplex |
triple expansion steam engine парна машина с тройно разширение Търсената дума е намерена |