재질 : 원목 사이즈 : 가로27cm X 세로18cm 구성 : 16종 나무 조각들로 구성되어 있습니다.
Easy blowing, High tone dog whistle, fitted with solid, waterproof pearl, to give a trill for those who want a distinctive and different sound. With a frequency that fluctuates by 750 Hertz. 210 Small ultra high pitch whistle has a natural cork ball which produces the familiar 'trilling' roll of the pea whistle. 210.5 Same as the 210 but with out the cork ball, produces a single extremely high frequency.
Specifications Fieldmicroscope Magnification (x) 20x (fixed) Optical system Upright, unreversed image; eyepiece diopter adjustable for right eye; 56-to-72mm interpupillary distance adjustment Field of vision (mm) 11 (diameter) Angle of view (º) 12.6 Vertical adjustment 50mm from the base of stage Eye relief (mm) 11.1 Plate Removal and reversible (top: flat; underside: built-in cup) Light source 2.5V-0.5A halogen lamp Light settings On/off Power source CR 123A lithium battery; approx. 1-hour bat
20-60×80 폴라스코프 배율(Magnification) 20~60x zoom 구경(Objective lens , mm) 80 화각 2 ° at 20X 1 ° at 10X 1000M에서의 시계(Field of view at 1000M , m) 105ft at 20X 52ft at 60X 사출동공 4-1.33mm 길이 437.0mm 무게(Weight , kg) 1.2kg