A.The 2004 Jubilee B.The 2006 Jubilee Edition C.Marine Stores Guide 2007 D.Marine Stores Guide 2008
A.week B.month C.three months D.six months
A.Increase the thrust of the propeller B.Protect the propeller from striking sawyers C.Prevent the propeller from striking barges towed on the ship D.Prevent the propeller from touching bottom in low water