常見例句雙語例句It is mainly engaged in ship hatch cover, steel products, machinery steel-port, the hull section, and marine engineering.主要經營范圍：船舶艙口蓋，鋼結構產品，港口機械鋼結構，船體分段，海洋工程。This paper explains the performance and specialty of the single-cover bi-directional bearing hatch, and introduces its composition, structure and manufacture technology in brief.敘述了單蓋雙向承壓出入艙口裝置的性能特點，并對其組成、結構形式及制造工藝作了簡要介紹。 返回 hatch cover