单项选择题 The booster pump, which supplies diesel oil to（） , should have a possibility of being powered by compressed air or by emergency power.

单项选择题 A full-flow 50μm filter is installed ,（） so the injection system components on the main engine are safeguarded.

单项选择题 The fuel from the bunker tanks must be treated by before entering the service tanks（）, from where the fuel enters（）