单项选择题
The （） or balance tank collects the re-circulated fuel oil.
A.buffer B.sump C.bilge D.overflowing
单项选择题 The （） chamber is enclosed between the cylinder head and piston.
单项选择题 The （） of the lubricant should be sufficient to hold the film together, but it should allow the lubricant to flow easily.
单项选择题 The （） of the diesel oil must not exceed 120 degree Fahrenheit.
