单项选择题
Which of the following statements describes the functions of a reservoir used in a hydraulic system?（）
A.Dissipate heat B.Trap foreign matter C.Separate air from the oil D.All of the above
单项选择题 Which of the following statements describes the functions of a reservoir used in a hydraulic system?（）
单项选择题 Which of the problems listed could be indicated if a sight glass in the refrigerant liquid line is full of bubbles?（）
单项选择题 Moisture in a refrigeration system can cause （）.
