单项选择题
Lighter longitudinal stiffening frames on the vessel side plating are called（）.
A.stringers B.side frames C.side stiffeners D.intercostals
单项选择题 In vessel construction，beams are transverse girders which provide support to（）.
单项选择题 In vessel construction，beam brackets are triangular plates that join the deck beam to a（）.
单项选择题 In Hatch No.3 the cargo（）bulk is peaked．
