短语词组短语american hull form 美国船壳保险单;美国船舶保险单equivalent hull form 等效船型Hull Form &Resistance 船形与阻力性能hull form design system 船体线型设计系统hull form design 船型设计hull form coefficients 船型参数ship hull form 船船型dutch hull form 荷兰船舶保险条款 返回 hull form