The （） should be gradually reduced after FWE.

A . packing gland B . mechanical seals C . lantern rings D . wearing ring

A . POINT OF ORIGIN B . PORT OF EXPORTATION C . PORT OF IMPORTATION

A . when two stations communicate with each other B . in any radio system and at any time C . when one ship sends a message to another station D . for communication among some statio

A . the four-way control valve failing to shift B . the bleeder valve sticking in the open position C . cold hydraulic fluid D . a clogged air vent falter on the oil reservoir

A . before the gripes are removed B . before loading the passengers C . after loading the passengers D . after the boat is afloat

A . before the stowage plan is made B . when the stowage plan is made C . after the stowage plan is made D . before loading