The pump has a constant stroke and the amount of fuel delivered is regulated by rotating （） which has a specially arranged helical groove cut into it.

The projection on a shaft designed to change circular m...

单项选择题The projection on a shaft designed to change circular motion into up and down or back and fore motion is called （）.

The process to remove exhaust gases by blowing in fresh...

单项选择题The process to remove exhaust gases by blowing in fresh air is called （）.

The process of loop scavenge is that the exhaust will b...

单项选择题The process of loop scavenge is that the exhaust will be via ports （） the air ports and controlled by the same piston.