（） provide the water to the pistons.
（） provide the water to the pistons.
An advantage of aluminum pistons， when compared to cast iron pistons is （）.
An advantage of aluminum pistons， when compared to cast iron pistons is （）.
确保两个活塞伸出长。 A: Make sure that the two pistons extend equally. B: Ensure the two pistons extend evenly. C: Ensure the two pistons extend uniformly.
确保两个活塞伸出长。 A: Make sure that the two pistons extend equally. B: Ensure the two pistons extend evenly. C: Ensure the two pistons extend uniformly.
The camshaft is used to open and close the valves with the motion of the pistons.
The camshaft is used to open and close the valves with the motion of the pistons.
Cast iron carrier rings， （） machined grooves， are provided for all the pistons.
Cast iron carrier rings， （） machined grooves， are provided for all the pistons.
A __________ changes the up-and-down motion of the pistons into spinning motion.
A __________ changes the up-and-down motion of the pistons into spinning motion.
Cylinder block holds pistons, the crankshaft and other parts.
Cylinder block holds pistons, the crankshaft and other parts.
For diesel engine piston cooling， lubricating oil can be supplied to the pistons by a/an （）.
For diesel engine piston cooling， lubricating oil can be supplied to the pistons by a/an （）.
The cylinders and pistons are in the upper part of the cylinder block and the crankshaft is in the lower part.
The cylinders and pistons are in the upper part of the cylinder block and the crankshaft is in the lower part.
A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.
A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.