有些新型的自记加速仪使用了一种可以重复充电的二氧化铝电池.Some recent accelerographs employ a lead dioxide rechargeable battery.凝固之后, 样品表面连续用金钢砂或氧化铝磨平.After setting, the surfaces of the specimens are ground down using carborundum and alumina.氧化铝作为铝锭...
The stethoscope is a medical instrument.听诊器是一种医疗器械.He invented a new type of stethoscope.他发明了一种新型听诊器.Through his stethoscope, Noah Townsend's clinical notes revealed, he heard suppressed breath sounds and lung rales...