18. 船舶應力名詞Sagging,其中文意義為何?
(A)艏傾
(B)艉傾
(C)舯垂
(D)舯拱
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統計: A(0), B(0), C(54), D(2), E(0) #2861078
統計: A(0), B(0), C(54), D(2), E(0) #2861078