| 1. | Laboratory glassware ; straight bore burette stopcocks
实验室玻璃仪器.直孔滴定管旋塞 |
| 2. | Laboratory glassware ; straight bore stopcocks
实验室玻璃仪器.直孔塞 |
| 3. | Laboratory glassware ; gas sampling tubes with straight bore stopcocks
实验室玻璃仪器.带直孔塞的气体采样管 |
| 4. | Improvement turning cone bearing into straight bearing for cinder and iron ladle
铁罐滚动轴承锥改直的探索 |
| 5. | Laboratory glassware . general purpose interchangeable stopcocks with single straight bore
实验室用玻璃器皿.单个直孔一般用途可互换管塞 |
| 6. | Laboratory glassware ; gas sampling tubes with straight bore stopcock and v - bore stopcock
实验室玻璃器皿.第3部分:单通旋塞和v形旋塞气体试样 |
| 7. | Laboratory ware made from fused quartz and fused silica ; straight bore stopcocks made from fused quartz
熔融石英和硅石制的实验室仪器.熔融石英制成的直孔旋 |
