China Marine Aluminum Quick Acting Weathertight Door with Central Handwheel: Standard: CB/T3477-96 for reference
China Marine Steel Quick Acting Weathertight Door with Single Lever: Standard:GB/T3477-1996 for reference
China Marine Aluminum Quick Acting Weathertight Door with Single Lever: Standard: GB/T3477-96 &CB/T454-97 for reference.
Lever-Operated Quick Acting Weathertight Door This is a kind of quick acting door which is opened and closed quickly and lightly. The lever handle makes people open doors easier.
Quick Acting Weathertight Door this door has two features: one is weathertight, another is quick acting. As a weathertight door, it has excellent weather tightness.As a quick acting door, it can be opened and closed quickly and lightly.