The wooden plug inserted in the vent of a damaged tank of a ship should be removed in case it is decided to().
Internal combustion engine crankcase vent outlets must be equipped with ()
Safety valves on a boiler vent to the ().
The wooden plug inserted in the vent of a damaged tank should be removed if you are going to ().
A venetian vent or rice ventilator is used in stowage of which cargo?().
A venetian vent or rice ventilator is used in stowage of which cargo?().
A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from().
Internal combustion engine crankcase vent outlets must be equipped with ()
A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from().
Safety valves on a boiler vent to the ().