日韩人妻无码一区二区三区久久99_日韩精品一区二区三区中文在线_无码日韩精品一区二区免费_久久久91精品国产一区二区三区_亚洲精品久久久一区黄无码_精品欧美一区二区在线观看欧美熟_精品一区二区高清免费观看_国产免费一区2区3区_国产日韩精品福利视频综合一区二区三区四区

Steel Structure Shipyard

Steel Structure Shipyard

The main purpose of shipyard is to store shipbuilding accessories, covering an area of 6000 square meters, with a 15 ton crane inside the plant. As it is close to the seaside, the requirements for rust prevention and fire prevention are relatively high. After installation, a layer of fire-proof paint shall be applied.