- hand reverberatory furnace
- 人工操作: manual operation; hand opera ...
- 人工操作: manual operation; hand operation◇人工操作长途电话台 manual toll board
- 人工操作的: hand operated; hand-operated; manual acting; manual-acting; manually-operated
- 人工操作阀: manually-operated valve
- 人工操作炉: hand worked furnace
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