box keelson[船] 箱形内龙骨
wing keelson舭内龙骨
main keelson[船] 中内龙骨;主内龙骨
boiler keelson锅炉基座内龙骨;锅炉底座下内龙骨;锅炉座内龙骨
keelson timber内龙骨
side keelson[船] 旁内龙骨;侧内龙骨;边内龙骨;外板
center keelson中内龙骨;中线内龙骨;竖龙骨;货舱
bilge keelson舭部内龙骨;[船] 舭内龙骨;内舭龙骨;船边内龙骨
keelson plate内龙骨板
N（名词） a longitudinal beam fastened to the keel of a vessel for strength and stiffness (船的)内龙骨