Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the ().
When the heat load begins to increase, the needle valve of an expansion valve will()
The four-stroke cycle begins with the piston ().
The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being ().
()for the Olympic Games begins about ten years in advance.
Hurry up. The lecture begins at 2:00.()
The temperature at which water vapor in the atmosphere begins to condense is called the ().
Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the ().
Hurry up. The lecture begins at 2:00.()
The two-stroke cycle begins with the piston coming up from the BDC, with the scavenging ports in the sides of the cylinders being ().