C. The oil drain port drains the oil from the APU oil
tank. The location of oil drain port is at the bottom of
the APU oil tank. The oil drain port has an oil pump
screen, two packings, an adapter assembly and a
slotted cover. The adapter assembly and slotted
cover increase the rate of oil drainage from the APU
oil tank and prevent accidental oil spillage during the
oil drainage procedure. The oil filler cap is located on
the top right side of the APU oil tank. The APU oil
Tank is full when the oil level is at the center of the
top sight glass.
http://i.imgur.com/GVBbgU7.jpg
以上（C）段 完完全全看不懂
不论是单字重拼还是整句翻译都不行啊啊啊
救命啊啊啊明天要考试 有没有人可以给予翻译
手机排版混乱对不起QQ