Feeding mechanism: bucket hoisting and manual double bell jar feeding mechanism is adopted which is easy to operate and can prevent gas leakage efficiently.
加煤机构：采用斗提卷扬机构，手动双钟罩加煤装置，操作简便、能有效防止煤气泄漏。
2
This paper proposes an automatic calibration system of bell prover gas calibration facility.
介绍了一种钟罩式气体流量标准装置自动检定系统。
3
Feeding mechanism: bucket hoisting and manual double bell jar feeding mechanism is adopted, which is easy to operate and can prevent gas leakage efficiently.