本实用新型公开了一种煤矿井口用的液压旋转式安全门，属于煤矿安全设备技术领域。
The utility model discloses a hydraulic revolving safety door used at mine entrance and belongs to the technical field of equipment for mine safety.
本实用新型公开了一种煤矿井口用的液压旋转式安全门，属于煤矿安全设备技术领域。
The utility model discloses a hydraulic revolving safety door used at mine entrance and belongs to the technical field of equipment for mine safety.
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