单项选择题
A.Height of the machine
B.Temperature of the liquid seal
C.Gravity disc
D.Bowl diameter
单项选择题 Which of the following is NOT on the list items to be recorded in Oil Record Book Part I (machinery space operation)?()
单项选择题 All bilge suctions must be fitted with suitable (), which in the machinery space would be mud boxes positioned at floor plate level for easy access.
单项选择题 The emergency bilge suction or bilge injection valve is used to prevent () of the ship.