单项选择题 Engines, which are to be run in parallel have governors specially adapted for the same（）, about 4% to obtain basic load sharing.

单项选择题 Governors are equipped with motors for synchronizing, load sharing and frequency control（）

单项选择题 In engines with system, the lubricating oil can be added to the engine through the filling hole in the crankcase cover, by using a hand oil can, or through the separator pipe（）