3-target vacuum tube solar heater是什么热水器

3-target vacuum tube solar heater是什么热水器 Vacuum Tube的意思 tube tube Tube target Target 英语翻译clap pipe triangleTripodsconical flasksVolumetric flaskMeasuring cylinderTeat/dropping pipetteGraduated pipettePipette fillerSpatulaBurette standThistle funnelBuchner/vacuum flaskTest tubesTest tube rackBoiling tubeRound bottomed flaskCon 请问这句句型怎么分析?This meant that the advent of smaller,faster,more reliable and less expensive computers than that were possible with vacuum-tube machines. vacuum 是 vacuum是什么意思 英语翻译The vacuum tube,invented near the beginning of our century,gave us the use of radio waves,an energy source never before captured,and later opened the road for television. 1.in an x-ray tube,electrons striking a target are brought to rest,causing x-rays to be emitted.in a particular x-ray tube,the maximum frequency of the emitted continuum x-ray spectrum is F0,if the voltage across the tube is doubled,the maximum frequ LED TUBE tube是什么意思 tube tunic tube是什么意思 sex tube