По , нужно в тексте подчеркнуть модальный глагол и его эквивалент. electrolyte capacitors can operate without a change only at temperatures not lower than -40 c. power loss in a line should not exceed a definite value. the shunt motor may be called a constant speed motor. the importance of semiconductors in our life can"t be overestimated.

vadimash    2   18.06.2019 15:10    1