船用齿轮控制操作
marine gear control operation
船用齿轮控制阀
marine gear control valve
船用齿轮方向控制阀
marine gear directional control valve
船用齿轮安装支架
marine gear mounting bracket
船用齿轮出厂编号
marine gear serial number
船用齿轮传动式汽轮机
geared marine steam turbine
船用齿轮方向操纵杆
marine gear directional control lever
船用齿轮减速式汽轮机
geared marine steam turbine