On a single-screw vessel the stern frame().
A. furnishes support to the rudder,propeller shaft,and transom frame
B. provides foundations for after mooring winches
C. provides foundations for the main propulsion engines
D. transfers the driving force of the propeller to the hull
查看答案
分诊程序应及时而简洁,一般要求在多长时间内完成()
A. 1~2分钟
B. 3~5分钟
C. 5~8分钟
D. 8~10分钟
玻璃的可见光透射比检测,覆盖可见光区波长范围为380-780mm。
A. 正确
B. 错误