fixed eccentric造句

例句与造句

1. Carmichael was the third son of Charles Carmichael, who developed and introduced a valve gear modification of a single fixed eccentric ( the valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder at the correct point in the cycle ) in 1818.
2. It's difficult to find fixed eccentric in a sentence. 用fixed eccentric造句挺难的