helium counter
常见例句
- 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。 - Lasers became an everyday technology when US supermarkets decided to automate their checkouts using barcodes that could be read by a red helium-neon laser built into the counter.
激光技术第一次走进日常生活，是美国超市使用发出红色氦氖激光的条形码扫描枪实现收款自动化。 返回 helium counter