safety sign notice interlock doors not open door during operation |
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| navigate by keyword : background caution close concept danger dangerous disturb door doorknob doorway enter entrance equipment handle hang hanger hazard home house illustration interior label lock message metal metallic motel nobody not open paper plastic privacy private protection quiet room safety security service sign silence sleep symbol tag travel vector warning white wooden |
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| Safety sign notice Interlock doors do not open door during operation. |
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