HB 993-1974
elevation column (English Version)
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HB 993-1974
Standard No.
HB 993-1974
Language
Chinese,
Available in English version
Published By
Professional Standard - Aviation
Status
Be replaced
1989-12
Replace By
HB 993-1989
Latest
HB 993-1989
HB 993-1974 history
1989
HB 993-1989
elevation column
1970
HB 993-1974
elevation column
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