准确理解和运用《1972年国际海上避碰规则》(1993年修正案)中的声响信号
준학리해화운용《1972년국제해상피팽규칙》(1993년수정안)중적성향신호
Accurately comprehending and applying the sound signals in the COLREG 1972 (Amendment 1993)
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