載重線標誌所標示之甲板線寬度為多少 ( mm )?
(A)25
(B)50
(C)300
(D)30
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統計: A(34), B(1), C(5), D(0), E(0) #286244
統計: A(34), B(1), C(5), D(0), E(0) #286244