General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 11874-1989
Scope
This standard specifies the opening direction and symbols for marine doors and windows. This standard applies to marine doors and windows that rotate about a vertical axis. This standard does not apply to horizontal axis rotation (or sliding) marine doors and windows.
GB/T 11874-1989 history
1989GB/T 11874-1989 Direction of opening and symbolic designation of marine doors and windows