你可能感興趣的試題

On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.

A.prevent the passage of flammable gases
B.prevent the passage of poisonous vapors
C.delay the spread of heat and flames
D.maintain watertight integrity

單項(xiàng)選擇題

Limit switches are used on which davits?（）

A.Sheath-screw davits
B.Gravity davits
C.Radial davits
D.Quadrantal davits

Permission is kindly requested（）the ballast water.

你可能感興趣的試題

On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.

Limit switches are used on which davits?（）

On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.