离散余弦变换DCT变换
discrete cosine transform
安装装修
installation and decoration
船舶修理和改装产值
out value of the ship repairing and modifying
船舶修造
ship mending and building
ship repairing and building
ship repair and building
Shipbuliding
建筑装修改造
building decoration renovation
移动船舶修理
removal of ship for repairs