单项选择题
737-300/500 SRM 51-10-02节中对结构裂纹端止裂孔的直径规定为()
A.0.10in
B.0.15in
C.0.20in
D.0.25in
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单项选择题
A.0.10in
B.0.15in
C.0.20in
D.0.25in
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