常见例句双语例句MINIMAM UTILITIES: Air-cooled small X-ray tube and gas filled proportional counter have been employed, and the only requirements are AC Power Source and Helium Gas.使用简单:仪器内置气体密封型比例计数管,只要接上电源和氦气(保护),就可以正常使用仪器。 返回 x-ray counter